IEC YEAR 4 FINAL EXAM 2024-2025, Exams of Nursing

Download IEC YEAR 4 FINAL EXAM 2024-2025 and more Exams Nursing in PDF only on Docsity! 1 | P a g e IEC YEAR 4 FINAL EXAM 2024-2025 WITH ACTUAL CORRECT QUESTIONS AND VERIFIED DETAILED ANSWERS |FREQUENTLY TESTED QUESTIONS AND SOLUTIONS |ALREADY GRADED A+|NEWEST|GUARANTEED PASS|LATEST UPDATE A single-family dwelling unit has three ovens rated at 6, 8, and 3.5 kW; a cooktop rated at 6 kW, and a broiler rated at 3.5 kW. The minimum demand factor to be calculated for the ungrounded service entrance conductors is ___. Select one: a. 18.6 kW b. 12.2 kW c. 30.1 kW d. 27.3 kW b. 12.2 kW The minimum number of 120-volt, 15-amp lighting branch circuits required for a dwelling that has 70 X 30 ft. of livable space is ___. Select one: a. 5 b. 3 c. 2 d. 4 d. 4 The demand factor for six residential clothes dryers in a multifamily dwelling unit is ___. Select one: a. 70% b. 80% 2 | P a g e c. 75% d. 60% c. 75% In a dwelling, the minimum feeder neutral for a 5 kVA clothes washer/dryer would be ___ kVA. Select one: a. 5 b. 4.3 c. 3.0 d. 3.5 d. 3.5 For track lighting installed in a retail store, a maximum of 2 feet of lighting track or fraction thereof shall be considered ___. Select one: a. 150 VA b. 180 VA c. 200 VA d. 100 VA a. 150 VA The minimum feeder allowance for show window lighting expressed in volt-amps per linear foot shall be ___ VA. Select one: a. 300 b. 200 c. 180 d. 100 b. 200 Before demand factors are taken into consideration in commercial buildings, general-use receptacle loads are to be computed at not less than ___ VA per outlet. Select one: a. 120 b. 180 c. 150 d. 100 b. 180 Where fixed multioutlet assemblies are employed, each ___ feet or fraction thereof of each separate and continuous length shall be considered as one outlet of not less than 180 volt-amperes where the connected appliances are likely to be used simultaneously. Select one: a. 1 5 | P a g e A dual-action fire alarm pull station ___. Select one: a. can only be installed on addressable systems b. requires two hand actions to operate the station c. allows for two distinct signals to occur d. all of these b. requires two hand actions to operate the station When installing FPL cable underground for a fire alarm system, the cable ___ when it is listed for direct burial. Select one: a. can be directly buried b. must contain an EGC when installed in PVC c. either a or b d. neither a nor b c. either a or b When installing a fire alarm system, survivability cable is typically used in a ___. Select one: a. restaurant b. hospital c. school d. single-story office building b. hospital The installation of a fire alarm system requires a plenum cable to be run above the lay-in ceilings. Which of the following cable types is acceptable?I. CMR II. CMP III. FPLR IV. FPLP Select one: a. III or IV only b. I, II, or III only c. II or IV only d. I or III only e. III only f. I, II, III, or IV c. II or IV only A fire alarm system monitors the circuit cables connected to it and causes a trouble signal when a break in the wiring is detected. For fire alarm systems, this circuit monitoring is referred to as ___. Select one: a. zoning b. protection c. conduction d. supervision 6 | P a g e d. supervision Which of the following can be utilized by a conventional fire alarm system?I. Class A IDCs II. Class B IDCs III. SLCs Select one: a. III only b. I or II only c. I or II & III d. I only e. II only b. I or II only A(n) ___ fire alarm system groups notification devices into zones. Select one: a. conventional b. addressable c. both a and b d. neither a nor b a. conventional For a fire alarm system utilizing the same device layout, a(n) ___ system requires fewer total feet of cable. Select one: a. conventional b. addressable b. addressable When working on an existing, disabled fire alarm system, you should ___. Select one: a. test the system for proper operation before re-enabling it b. test all wiring before making any terminations at the panel c. both a and b d. neither a nor b c. both a and b After repairs have been made to an existing fire alarm system, you should put the system back on line ___ notifications are made. Select one: a. after b. before b. before Before working on an existing and active fire alarm system, you should notify the ___. Select one: 7 | P a g e a. building tenants b. building owner c. monitoring company d. all of these d. all of these Coaxial cable shall be permitted to deliver power to equipment that is directly associated with the radio frequency distribution system if the voltage is not over ___ volts and if the current is supplied by a transformer or other device that has power-limiting characteristics. Select one: a. 90 b. 25 c. 70 d. 60 e. 30 d. 60 Generally, ___ cable has a higher bandwidth and can transmit larger amounts of data. Select one: a. copper b. fiber optic b. fiber optic Listed communications cables installed in risers shall be ___. Select one: a. encased in a metal raceway b. located in a fireproof shaft having firestops at each floor c. either a or b d. neither a nor b c. either a or b A ___ system is used for surveillance and/or recorded documentation. Select one: a. MATV b. CCTV c. CATV d. any of these b. CCTV The wire colors used in 4-pair UTP cables are ___. Select one: a. red-blue-yellow-orange b. brown-orange-yellow-green 10 | P a g e c. 50 d. 125 c. 50 Overcurrent protection for feeders and branch circuits supplying electric vehicle supply equipment shall have a rating of not less than ___% of the maximum load of the electric vehicle supply equipment. Select one: a. 80 b. 200 c. 125 d. 100 e. 150 c. 125 Lamps in cellulose nitrate film storage vaults shall be installed in rigid luminaires of the ___ type.I. glass- enclosed II. guarded III. gasketed Select one: a. I & III only b. I, II & III c. II & III only d. II only e. I & II only a. I & III only A theater stage switchboard is used primarily to feed stage equipment and can contain ___, dimmers or relays with associated overcurrent protective devices, or overcurrent protective devices alone. Select one: a. fuses b. dimmers c. relays d. all of these d. all of these A ___ is an assembly cable containing one male and two female cord connectors used to connect two loads to one branch circuit. Select one: a. tap box b. splitter c. transfer cable d. two-fer e. breakout assembly d. two-fer 11 | P a g e What is the maximum distance that a disconnect can be located from the operator's station for a carnival ride? Select one: a. 10 ft. b. 50 ft. c. 25 ft. d. 6 ft d. 6 ft. In a recreational vehicle park with electrical supply, at least ___% of the sites shall be equipped with 30- ampere, 125-volt receptacles. Select one: a. 100 b. 5 c. 70 d. 20 c. 70 Every recreational vehicle site with electrical supply shall be equipped with at least ___ 20-ampere, 125- volt receptacle(s). Select one: a. one b. three c. two d. four e. none are required a. one The power supply cord to a mobile home must not be longer than ___ feet. Select one: a. 361/2 b. 21 c. 261/2 d. 20 e. 50 a. 36 1/2 The power supply to the mobile home shall be a feeder assembly consisting of not more than one listed ___-ampere mobile power-supply cord with an integrally molded or securely attached plug cap or a permanently installed feeder. Select one: a. 60 b. 100 c. 30 12 | P a g e d. 50 e. 20 d. 50 Outdoor mobile home disconnecting means shall be installed so the bottom of the enclosure containing the disconnecting means is not less than ___ above finished grade or the working platform. Select one: a. 11/2 ft. b. 6 ft-7 in. c. 2 ft. d. 6 ft-6 in. e. 21/2 ft. c. 2 ft. Switching devices shall be located at least ___ horizontally from the inside walls of the pool. Select one: a. 18" b. 5' c. 2' d. 4' a. 18 All fixed metal parts that are within ___ feet horizontally of the inside walls of a permanently installed swimming pool must be bonded together. Select one: a. 10 b. 5 c. 20 d. 7 e. 8 b. 5 A 120-volt receptacle located at ___ feet from the inside wall of a swimming pool must be GFCI protected. Select one: a. 19 b. 15 c. 10 d. all of these d. all of these A wet-niche swimming pool luminaire is supplied by a 14 AWG flexible cord and protected with a 15- amp, GFCI breaker. The minimum size equipment grounding conductor required is ___ AWG. Select one: 15 | P a g e b. 60 Automatic transfer switches (ATS) for emergency systems shall be electrically operated and ___ held. Select one: a. mechanically b. manually c. automatically d. pneumatically e. electrically a. mechanically The optional standby system wiring ___ be permitted to occupy the same raceways, cables, boxes, and cabinets with other general wiring. Select one: a. shall b. shall not a. shall When emergency system power generators are out of service for major maintenance or repair, ___ shall be available. Select one: a. utility power b. a temporary or portable alternate source c. a wind powered source d. a solar powered source e. any of these b. a temporary or portable alternate source A typical standby system ATS ___. Select one: a. transfers the electrical load to the generator when the normal source fails b. disconnects the normal power source connections when the normal power source fails c. signals the generator to stop when the normal power source is restored d. transfers the load back to the normal power source when the normal source is restored e. all of these e. all of these Transfer equipment for emergency systems shall be designed and installed to prevent the inadvertent interconnection of ___ sources of supply in any operation of the transfer equipment. Select one: a. normal and emergency b. grounded and ungrounded c. utility and permanent d. temporary and generator set 16 | P a g e a. normal and emergency Audible and visual signal devices on emergency system transfer equipment shall be provided where practicable for ___. Select one: a. indicating that the battery is carrying the load b. indicating derangement of the emergency source c. indicating that the battery charger is not functioning d. indicating a ground fault in a solidly grounded wye emergency system of more than 150 volts to ground and circuit protective devices rated 1,000 amperes or more e. all of these e. all of these Storage batteries, other than lead-acid batteries, shall be ___. Select one: a. exposed b. approved c. identified d. listed d. listed For battery chemistries with ___ electrolyte, the structure that supports the battery shall be resistant to deteriorating action by the electrolyte. Select one: a. gaseous b. solid c. liquid d. corrosive d. corrosive A vessel that holds the plates, electrolyte, and other elements of a single unit in a battery is known as a(n) ___. Select one: a. cell b. storage battery c. electrolyte d. container d. container PV Modules intended for use in PV systems shall be ___ or be evaluated for the application and have a field label applied. Select one: a. listed b. identified 17 | P a g e c. suitable d. approved a. listed The PV system disconnecting means shall be in a location that is ___. Select one: a. readily accessible b. accessible to qualified persons only c. accessible d. accessible to qualified persons a. readily accessible As it relates to the rapid shutdown of a PV system, the term array boundary is ___ inches from the array in all directions. Select one: a. 18 b. 12 c. 24 d. 6 b. 12 Photovoltaic systems with PV system dc circuits operating at ___ volts dc or greater between any two conductors shall be protected by a listed PV arc-fault circuit interrupter or other system components listed to provide equivalent protection. Select one: a. 80 b. 30 c. 300 d. 150 a. 80 A rapid shutdown switch for PV systems shall have a label located on or no more than ___ feet from the switch. Select one: a. 3 b. 6 c. 4 d. 2 a. 3 Overcurrent protection for interconnected electric power production source conductors connected to the supply side of the service disconnect means for a dwelling shall be located within ___ feet of the point where the electric power production source conductors are connected to the service. Select one: 20 | P a g e What size THHN copper transformer secondary conductors will be required to feed a 3-phase, 30 hp, 480-volt motor load? The secondary conductors terminate at a fusible disconnect with 70 amp fuses. The - transformer primary is supplied by a 12,470-volt circuit protected with 10 amp fuses. Select one: a. 3 b. 10 c. 6 d. 4 e. 8 d. 4 A 50 hp 230-volt, 3-phase squirrel cage motor has a full-load current of ___ amps. Select one: a. 143 b. 802 c. 130 d. 114 e. 179 c. 130 A 14 AWG THHN copper conductor is used between a motor starter and a remote start/stop station. What is the maximum size circuit breaker permitted for the motor short-circuit ground-fault protection that will also protect the 14 AWG conductor? Select one: a. 15 amp b. 10 amp c. 45 amp d. 60 amp c. 45 amp Where the motor control circuit transformer rated primary current is less than 2 amperes, an overcurrent device rated or set at not more than ___% of the rated primary current shall be permitted in the primary circuit. Select one: a. 250 b. 167 c. 125 d. 300 e. 500 e. 500 Determine the minimum size overload protection required for a 480-volt, 3-phase, 15 hp, continuous duty motor given the following information. Design B temperature rise - 40ºC service factor - 1.12 actual nameplate rating - 18 amps 21 | P a g e Select one: a. 23.4 amps b. 22.5 amps c. 18 amps d. 20.7 amps d. 20.7 amps For a nonautomatically started motor, the overload protection shall be permitted to be shunted or cut out of the circuit during the starting period of the motor if the device by which the overload protection is shunted or cut out cannot be left in the starting position and if fuses or inverse time circuit breakers rated or set at not over ___ percent of the full-load current of the motor are located in the circuit so as to be operative during the starting period of the motor. Select one: a. 130 b. 140 c. 115 d. 125 e. 400 b. 140 Determine the maximum current setting permitted for overload protection for a motor that has a thermal protector integral with the motor, given the following information. 71/2 hp - wound rotor type two-phase, 4 wire, AC * 230 volts Select one: a. 32.3 amps b. 29.6 amps c. 26.6 amps d. 19 amps b. 29.6 amps When service-entrance conductors exceed 1100 kcmil for copper, the required grounded conductor must be sized not less than ___ percent of the area of the largest phase conductor. Select one: a. 15 b. 12.5 c. 19 d. 25 b. 12.5 The minimum number of 20-amp, 277-volt, lighting circuits required for a 150,000 ft2 department store is ___. The actual connected lighting load is 400 kVA. Assume breakers are not rated for continuous use. Select one: a. 102 b. 72 22 | P a g e c. 82 d. 91 d. 91 The unit lighting load for dwellings, expressed in VA per square foot, is ___. Select one: a. 2 b. 5 c. 3 d. none of these c. 3 What is the demand factor for five household clothes dryers? Select one: a. 85% b. 75% c. 100% d. 65% a. 85% What is the minimum demand load for general-purpose receptacles in an office building that has 150 receptacles? Select one: a. 27,000 VA b. 10,000 VA c. 18,500 VA d. 13,500 VA c. 18,500 VA Under the optional method for a single-family dwelling, general loads beyond the initial 10 kW are calculated at a ___ percent demand factor. Select one: a. 40 b. 75 c. 50 d. 60 a. 40 It shall be permissible to apply a demand factor of ___% to the nameplate ratings of 4 or more fastened- in-place water heaters in a multifamily dwelling. Select one: a. 50 b. 80 25 | P a g e residential audio systems generally utilize _ ohm speakers 8 ohm an audio system network can be utilized to provide _ paging/ emergency notification/ background music/ any of these a _ system is used for serveillance and or recorded documentation CCTV a computer network can be _ either wireless or hardwired when used for a buisness facility's computer network the MDF may _ any of these ! contain the client servers be primary connection point for the internet provider be connected to an IDF for large systems a CATV netweork may utilize a head-end to provide pre-recorded information. this information can be sent over a specific channel of the MATV system _ are typical applications for an MATV system all of these large hotels dorms inis components of a basic network include _ all of these : a public provider devices cable a head-end the maximum length limitation for RG-11 cable is _ feet 1000 a commonly used type of coaxial cable used for video applications is _ all of these : RG6/U RG59/U RG11/U 26 | P a g e when installing coaxial cable the tesion applied when pulling can not exceed _ pounds 90 CCTV coax cable is constructed with a _ shield copper the construction of coaxial cable serves to prevent electromagnetic interference because it provides less signal loss, quad shield coaxial xable is used for _ tv signals digital when installing coaxial cable _ ends shall be labeled both the maximum length limitation for RG-59 cable is _ feet 500 when installing utp cable the tension applied when pulling can not exceed _ pounds 25 when terminating utp cables the length of the wire to be untwisted for each pair is _ not to exceed 1/2 inches the wire colots used in 4 pair utp cables are_ blue oragne green and brown utp cables can be terminated with _ RJ-45 connectors or 110 blocks a RJ-45 connector used to terminate utp cable has _ pins 8 cat _ utp cables are used for LANs 6 or 5E only cat3, 5e and 6 utp cables used for _ contain stranded conductors patch cords an optical fiber cable transmits_ photons _cable is more secure against eavesdropping because the cable must be physically tapped to do so 27 | P a g e fiber optic the installation costs for _ cable is less copper fiber optic cables can be terminated with _ connectors any of these : SC FC ST optical fiber cable is permitted to be installed _ any of these : as an aerial cable underground in conduit as direct burial cable indoors which of these fiber optical cables can transmit light the greatest distance single-mode step index fiber _ cable will not pick up electric noise or generate electromagnetic radiation that may interfere with other signals fiber optics the core of optical fiber cable is covered with _ cladding the _ of optical fiber cable reflects the light throughout the length of cable core communications wires and cables shall be seperated at least _ inches from conductors of any electric light, power class 1, non power limited fire alarm, or medium power networkd powered broadband communications circuits 2 openings around penetrations of coaxial cables anf catv raveways through fire resistant rated _ shall be firestopped using approved methods to maintain the fire resistance rating any of these : partitions floors walls ceilings 30 | P a g e all of the above : is not intended as a design specification is not intended as an instruction manual for untrained persons is not necessarily efficient the demand factor of any system is the ration of the maximum demand for a system to _ the total connected load of the system if festoon lighting exceeds _ feet the conductors shall be supported by messenger wire 40 the highest current at rated voltage that a device is identified to interrupt under standard test conditions is known as _ interrupting rating messenger wires used to support festoon wiring shall not be attached to any _ all of these plumbing downspout fire escape a _ branch circuit supplies two or more receptacles or outlets for lighting and appliances general purpose equipment is considered to be accessible when _ aall of the above conductors for festoon lighting shall be of the _ type thermoplastic a multiwire branch circuit can supply _ either : 120/240 volts to only one piece of utilization equipment 120/240 volts where all ungrounded conductors are opened simultaneously operations at loads and for intercals of time both of which may be subject to wide variation is the definition of _ varying duty an attachment plug cap mates with a _ receptacle overhead conductors not supported by messenger wires, for festoon lighting shall not be smaller than _ 31 | P a g e 12 awg rainproof raintight or watertight equipment can fulfill the requirements for _ weatherproof the internal depth of outlet boxes intended to enclose flush devices shall be at least _ 15/16th for system over 1000 volts the distance between each cable or conductor entry inside the box and the opposite wall of the box shall not be less than _ times the outside diameter over sheath of the largest cable or conductor 36 where permanent barriers are installed in a junction box each section shall be considered as a _ separate box luminaires shall be supported independently of the outlet box where the weight exceeds _ pounds unless the outlet box is listed and marked for the maximum weight to be supported 50 which answer best completes the following sentence describing the code requirements for the use of short radius capped elbow conduit bodies containing conductors smaller than 6awg capped elbow type conduit bodies _ may be used to enable the installation of the raceway the front edge of a switch box installed in a wall constructed of wood shall be _ from the surface of the wall flush with or projected out nonmetallic boxes shall be suitable for the lowest _ conductor entering the box temperature rated a means shall be provided in each metal box over 100 cubic inches for the connection of an equipment grounding conductor the means shall be permitted to be _ a tapped hole enclosures supported by suspended ceiling systems shall be fastened to the framing member by mechanical means such as _ all of these : clips identified for use screws rivets bolts 32 | P a g e a 2 in raceway is to be installed in a pull box for a straight pull conductors are 4 awg or larger what is the minimum length of the pull box as required by the NEC 16 in. angle pull dimensional requirements apply to junction boxes only when the size of conductors is equal to or longer than _ awg 4 how many 12 awg conductors may be installed in a 3 1/2" deep 3 gang masonry box that contains three switches 22 a 3x2x2" device box has a volume of _ cubic inches 10 a device box contain four 10 awg conductors and four 12 awg conductor s assuming each conductor carries current for the purposes of determining box fill these conductors are equivalent to _ cubic inches 19 for the purpose of determining box fil 12 awg THWN copper wire is to be calculated at _ cu in 2.25 when two switches are mounted on the same strap the number of conductors allowed in the box shall be reduced by a minimum of _ conductors 2 cables of the ac type except acl shall have an internal bonding strip of _ in intimate contact with the armor for its entire length either aluminum copper according to the NEC flat conductor cable is permitted to be used for _ either general purpose circuit conductors appliance circuit conductors flexible cords shall be connected to devices and to fitting so that tension will not be transmitted to joints or terminal screws. this shall be accomplished by _ any of these using special fittings designed for this winding the cord with tape tying a knot in the cord 35 | P a g e moisture _ insulating material shall be permitted to be used without boxes in exposed cable wiring 1 2 and 3 switch devices outlet devices tap devices metal components of the FCC system shall be _ 1 2 or 3 insulated from contact with corrosive substances coated with corrosion- resistance materials corrosion resistance type MV cables shall be permitted for use on power systems rated up to _ volts 35000 conduit used to protect direct buried cable shall be provided with a _ where the cable leaves the conduit underground bushing underground service conductors carries up a pole must be protected from mechanical injury to a height of at least _ feet 8 when installing a 20 amp 120 volt GFCI protected below ground UF cable branch circuit that serves a yard light for residence what is the minimum ground cover required for the cable? 12 in. where installing direct buried cables a _ shall be used at the end of the conduit that terminates underground 2 or 3 bushing terminal fitting underground cable installed under a building shall be in a _ that is extended beyond the outside walls of the building raceway backfill used for underground wiring must not _ all of these prevent compaction of the fill 36 | P a g e damage the wiring method contribute to corrosion of the raceway Type UF cable, buried underground, fed from a 15-ampere, ground-fault circuit interrupter must have a minimum cover of ___ inches 12 when direct buried conductors emerge from the ground and extend up a pole these must be protected by enclosures or raceways to a height of _ feet above finished grade 8 421 the code required all conductors that attach to the cable bus to be in the same raceway because _ of inductive current in general rigid metal conduit shall be _ of each outlet box junction box device box cabinet boduit body or other termination securely fastened within 3' aluminum fittings and enclosures shall be permitted to be used with _ conduit any of these: steel regid metal polyvinyl chloride aluminum rigid metal what is the area in square inches for a 12 awg RHH with an outer covering? 0.0353 when a 4 awg or larger conductor enters a panelboard a _ must be provided insulated bushing a vertical run of 4/0 awg copper conductors must be supported at intervals not exceeding _ feet 80 the number of 12 awg THW conductors allowed in a 3/4" IMC conduit will be _ the number of 12 AWG TW conductors allowed in 3/4" EMT conduit. less than if the conductors are 8 awg TW you may install _ of these in a 1 1/4" emt 13 37 | P a g e in areas where the walls are frequently washed conduit should be mounted with a _ inch air space between the wall and the conduit 1/4 conductor fill may be up to _ percent of the cress-sectional area in underfloor raceways 40 threadless couplings for rigid metal conduit installed in wet locations shall be _ listed for use in wet locations when all of the conductors are the same size to calculate the maximum number of conductors permitted in a conduit the next higher whole number shall be used to determine the maximum number of conductors permitted when the calculation results in a decimal of _ or larger 0.8 which of the following is not true regarding polycinyl chloride conduit ? it can be used to support fixtures conductors installed in concealed raceways are considered _ inaccessible conductors in raceways must be _ between outlet devices and there shall be no splices or taps within raceways continuous Where nails or screws are likely to penetrate nonmetallic sheathed cable or ENT installed through metal framing members, a steel sleeve, steel plate, or steel clip not less than ________ in. in thickness shall be used to protect the cable or tubing. (a) one sixteenths (b) ⅛ (c) ½ (d) ¾ 1/16th when directly buried outdoors rigid metal conduit must have at least _ inches of cover 6 In vertical raceways, 3/0 AWG aluminum conductors must be supported if the vertical rise is greater than ___ ft. 180 where raceways are exposed to widely different temperatures they shall be _ 40 | P a g e except by special permission no conductor larger than _ shall be installed in cellular metal floor raceways 1/0 awg When conduit nipples having a maximum length not to exceed ___ inches are installed between boxes and similar enclosures, the nipples shall be permitted to be filled to 60% of their cross-sectional area. 24 when the calculated number of conductors all of the same size includes a decimal fraction the nect higher whole number shall be used if _ 0.8 or larger five 1 awg and five 3 awg copper THW conductors are to be installed in a 20 foot length if IMC raceway what is the minimum allowable trade size IMC required to contain these conductors 2 1/2" the parallel conductors in each phase neutral or equipment grounding conductor shall _ all of these : be terminated in the same manner have the same circular mil area and insulation type be the same length and conductor material the installation of outside wiring on surfaces of buildings shall be permitted for circuits not over 1000 volts nominal as _ all of these: flexible metal conduit EMT open wire on insulators conductors shall not be installed in locations where the operating temperature will exceed that specified for the type of _ used insulation when two multiwire branch circuits from different systems are installed in the same raceway and the neutral from one system has an outer covering of white the other circuits neutral is permitted to have an outer covering of _ 2 and 3 only natural gray white with a colored stripe other than green thermoplastic insulated fixture wire shall be durably marked with the awg size voltage rating and other required markings on the surface at intervals not exceeding _ inches 24 41 | P a g e the grounded conductor when insulated shall have insulation _ 2 only which is suitable other than color for any ungrounded conductor of the same circuit on circuits of less than 1000 volts Type XHHW insulated conductors are permitted to be used in _____. a) dry locations only b) wet locations only c) dry or damp locations only d) dry, damp, or wet locations dry damp and wet locations Among the conductors listed below, all except ___ are permitted to be connected in parallel. 1 awg adjacent load carrying conductors have the dual effect of raising the _ and impeding heat distribution ambient temp the number of conductors permitted in raceways is limited to _ all of these: permit heat to dissapate prevent damage to insulation during removal of conductors prevent damage of insulation during installation When conductors are installed in a conduit or tubing nipple of _____ or less in length, the ampacity adjustment factors for more than three (3) current-carrying conductors in the raceway are not required to be applied. 24 Determine the conductor ampacity given the following related information: 1.Conductors are size 500 kcmil copper -conductor insulation is THWN -eight (8) current-carrying conductors are in the raceway -ambient temperature is 125 deg. F 2.Conduit length is 50 feet 3.Installation is a wet location 178.2 amps a nipple contains six 6 awg thw copper current carrying conductors the ampacity of each conductor would be _ amps 65 when a conduit contains six current carrying conductors and is installed in a 22C dry location the allowabale ampacity of each of the six 750 kcmil xhhw aluminum conductors is _ amps 42 | P a g e 361.92 conductor awg numbers vary _ with the ampacity inversly a fixture rated at 7 amps requires a size _ awg fixture wire as a minimum 16 conductor overload in not required of _ interruption of the circuit can create a hazard as a minimum a three wire 120/240 v single phase 200 amp service for a dwelling requires _ awg thw copper conductor 2/0 422 What is the largest size conductor that is permitted to be connected with a wire binding screw? 10 awg What is the maximum allowable voltage between conductors on a branch circuit supplying lighting fixtures in a residence? 120 volts All splices and joints and the free ends of conductors are required to be covered with an insulation _ the conductor Equivalent to The new requires gfci _ to be readily accessible Both receptacles circuit breakers Unused openings in metal boxes panels and other enclosures shall _ Be slashed to afford protection An outlet where one or more receptacles are installed is called a _ outlets Receptacle Multiwire branch circuits shall supply _ Only line to neutral loads A _ is a system or circuit conductor that is intentionally grounded 45 | P a g e For electric snow melting or de icing equipment A _ shall be used to connect the grounding terminal of a grounding type receptacle to a grounded box Equipment bonding jumper A non-grounding-type receptacle is permitted to be replaced with another _ receptacle where no grounding means exists in the outlet. Non grounding type The identification of terminals to which a grounded conductor is to be connected shall be substantially _ in color White Switch controlled receptacles are permitted in all except which of the following? Kitchen and bathroom A luminaire installed outdoors is permitted to be supported by _ 1 2 or 3 trees metal pole an outlet box A luminaire that weighs more than 6 pounds or exceeds _ inches in any dimension shall not be supported by the screw shell of a lampholder 16 Vegetation such as trees shall not be used for support of _ Overhead conductor spans A luminaire that weighs more than _______ pounds shall be supported independently of the outlet box, unless the outlet box is listed and marked on the interior of the box to indicate the maximum weight the box shall be permitted to support. 50 In existing buildings where the nonmetallic sheathed cable is concealed listed interconnector devices of insulating material shall be permitted to be used without boxes_ Both for repair wiring in exposed cable wiring _ plugs driven into holes in masonry shall not be used Wooden How would you seal unused knock outs in panels and boxed? 46 | P a g e Metallic plugs or plates Soldered splices must be ___ so as to be electrically secure before soldering. Joined mechanically Electric equipment shall be installed in a neat and _ manner Workmanlike Conductors shall be _ unless otherwise provided in the code Copper, aluminum, or copper clad aluminum Unless identified for use in the operating environment, no conductors or equipment shall be _____ having a deteriorating effect on the conductors or equipment. Located in damp or wet locations and where exposed to gases fumes vapors liquids or other agents Conductor sizes are given in awg or _ Circular mils In judging equipment, considerations such as the following shall be evaluated 1 and 3 only mechanical strength arcing effects Equipment intended to interrupt current at fault levels must have an interrupting rating at nominal circuit voltage that is ____ At the line terminals 423 In dwelling units receptacle outlets required for the kitchen countertops must be located above but not more than _ above the countertop 20 in A single 1500 w cord and plug connected load on a 120 v circuit would draw - amps this number requires a _ wire and a _ circuit breaker 12.5. 12 awg. 20 amp Recessed incandescent or led luminaires with a completely enclosed light source are permitted to be installed above the door or in the ceiling of clothes closet provided there is a minimum clearance of _ inches between the luminaire and the nearest point of a storage space 6 47 | P a g e The 24 inch dimension required for a dwelling unit countertop receptacles is measured along the wall line or center line the intent is that there be a receptacle outlet for every _ linear feet or fraction thereof of counter length 4 Which of the following does not require a switched outlet according to the new? A drive through garage door Where the new specifies that one equipment shall be within sight of another equipment the specified equipment shall be visible and not more than _ feet distant from the other 50 For a one-family dwelling, at least one receptacle outlet shall be installed in each: basement. attached garage. detached garage. a) I only b) I and II only c) II and III only d) I, II, and III 1 and 2 only For a dwelling units a branch circuit cupplying _ receptacle outlets is permitted to also supply receptacles in an unfinished basement Outdoor A 120 v receptacle is installed on a dwelling unit kitchen island countertop that is 8 feet from the kitchen sink which one of the following if any is correct? GFCI protection is required for all countertop kitchen receptacles Hanging luminaires located directly above any part of the bathtub shall be installed so that the luminaire is not less than ___ ft above the top of the bathtub rim. 8 Surface mounted incandescent or led with a completely enclosed light source are permitted to be installed above the door or on the ceiling of a clothes closet provided there is a minimum clearance of _ inches 12 A branch circuit provides power to a receptacle in bathroom 1, this branch circuit is permitted to also provide power to _ 1 or 2 only two other receptacles two luminaires plus an exhaust fan in bathroom 1 two other receptacles in bathroom 1 plus receptacles in bathrooms 2 and 3 50 | P a g e 50 The maximum height to the center of the grip of the operating handle of a circuit breaker installed in a panel board shall not exceed _ above the floor or working platform 6'7" Where required drawings for feeder installations must be submitted before _ Beginning of installation Metallic surface type cabinets for electrical equipment located in damp or wet locations shall be mounted so there is at LEAST _____ air space between the cabinet and the wall or other supporting surface. a) 1⁄8 inch b) 1⁄4 inch c) 3⁄8 inch d) 1⁄2 inch 1/4" Where a change occurs in the size of the underground conductor a similar change shall be permitted to be made in the size of the _ conductor Grounding The standard amp rating for fuses and fixed trip circuit breakers are listed in article 240 additional standard rating for fuses shall be _ amps All of these 601 10 6 No grounded interior wiring shall be electrically connected to a supply system unless the supply system contains a corresponding conductor which is ___. Grounded When overcurrent devices are selectively coordinated and a fault occurs somewhere on a branch circuit, what should happen? The branch circuit OCPD that is nearest the fault should open Service drop conductors shall have a vertical clearance of not less than _ ft above the roof surface 8 Service conductors supplying one building shall not _ of another building Pass through the interior Grounding electrodes made of pipe or conduit shall not be smaller than trade size_ 51 | P a g e 3/4" A single electrode consisting of a rod pipe or plate that does not have a resistance to ground of _ or less shall be augmented by one additional electrode 25 ohms Service conductors are the conductors from the service point to the _ Service disconnection means Disregarding exceptions, all 3-phase, 4-wire, 480Y/277 volt, electrical services, require ground-fault protection for each service disconnecting means when rated for at LEAST _____ or more? 1000 Where necessary to prevent _ an automatic overcurrent protecting service conductors supplying only a specific load such as a water heater shall be permitted to be locked or sealed where located so as to be accessible Tampering Where more than one building or other structure is on the same property and under single management each building or other structure served shall be provided with means for disconnecting all _ conductors located nearest the point of entrance of the supply conductors 2 only ungrounded Without exceptions the minimum size service lateral conductors allowed by the NEC is _ 8 awg copper Communications conductors shall be mounted not less than _ inches below power conductors rated over 300 v supported on poles 30 Service entrance cables where subject to physical damage shall be protected by any of the following _ 1 2 and 3 EMT IMC RMC A _ is considered to be service equipment by the NEC 2 and 3 only service disconnecting means panelboard For a one family dwelling the service disconnecting means shall have a rating of not less than _ 52 | P a g e 100 A building is provided with two sets of service drop conductors from the utility pole. One service drop is 120/240 v for lighting and receptacle loads and the other service is 480 v to supply motor loads. How many disconnecting means are permitted for this building 12 Where exposed to the weather, raceways enclosing service-entrance conductors shall be _____ Suitable for use in wet locations arranged to drain Conductors shall be considered outside a building where installed _ 2 and 3 within a building in a raceway enclosed by 2" of brick under not less than 2" of concrete beneath a building The service disconnect shall be located _ for single and two family dwellings at a readily accessible outdoor location given: you have a surface mounted wireway installed below a surface mounted panelboard the wireway and the panelboard are connected togeth by means of conduit nipples the wireway shall be permitted to extend not more than _ in beyons the fron of the panelboard 6inches the width of the working space in front of the electric equipment shall be the width of the equipment or _ inches whichever is greater 30 the minimum headroom of working spaces about service equipment or motor control centers shall be _ 6'6" Covered, shielded, fenced, enclosed, or otherwise protected by means of suitable covers, casings, barriers, rails, screens, mats, or platforms to remove the likelihood of approach or contact by persons or objects to a point of danger is the definition of ___. guarded the minimum depth of working space 240/120 v 3phase 4wire panelboard with exposed live parts on one side and grounded parts on the other shall be at least _ feet 3 1/2' An overhead feeder is to be installed to a residential garage. The conductors are insulated and have a voltage of 120 volts to ground. This circuit does not pass over a sidewalk or driveway. What is the minimum height above the ground that must be maintained? 55 | P a g e given: a metal underground water pipe is used as a grounding electrode and used to bond other electrodes together the grounding electrode conductor is connected to the water pipe on the interior of the building the connection of the grounding electrode conductor to the interior water pipe shall be made a maximum of ___ feet from the point where the water pipe enters the building. 5 a grounding electrode conductor shall not be required for a system that supplies a _ circuit and is derived from a transformer not more than 1000 VA all of these class 1 class2 class3 plug fuses and fuse holders can be used in circuits supplied by a system having a grounded meutral point and having no conductor at over _ volts to ground 150 the largest standard rating for an inverse time circuit breaker is _ amps 6000 to ensure effective continuity between enclosures _ shall be removed from the conduit threads enamel inverse time circuit breakers that have an interrupting rating other than _ amps shall have the interrupting rating indicated on the breaker 5000 a _ is used to connect the groudning electrode to the equipment or to the grounded conductor at the service equipment grounding electrode conductor a single family dewlling has a 200 amp 120/240 single phase main service panel and is being fed with 2/0 awg THW copper ungrounded service entrance conductors in a rigid metal conduit the minimum allowable size of the MBJ for this service entrance conduit is _ 4 awg A two pole circuit breaker that may be used for protecting a 3 phase corner grounded delta circuit shall be marked 1Ø-3Ø a single electrode consisting of a _ which does not have a resistance to ground of 25 ohms or less shall be augmented by one additional electrode 1 2 or 3 rode 56 | P a g e pipe plate a current limiting overcurrent protective device is a device that will _ the current flowing in the faulted circuit reduce` an equipment bonding jumper on the supply side of the service must not be smaller than the sizes shown on table _ 250.102(C)(1) electrodes of steel or iron shall have a diameter of at least _ 5/8" circuit breakers shall be marked with their amp rating in a manner that will be _ after installation 2 and 3 only durable visible given: you have tenant spaces in a mall; each occupant shall have acess to the main disconnecting means except where _ the service and maintenance are provided by the building management Plug fuses of the Edison-base type shall be used only _____. as a replacement in existing installations a 600 ampmain breaker service panelboard is fed with four parallel sets of 1/0 kcmil copper what is the smallest copper grounding electrode conductor that can be installed to the steel structure 1/0 awg what size copper grounding electrode conductor is required for a 1500 kcmil copper service conductor? 3/0 awg` which of the following is not true per the NEC under certain conditions equipment grounding conductors shall be required to be larger than the circuit conductors supplying the equipment luminaires used in a show window shall be permitted to be externally wired_ chain supported raceways on exterior surfaces of building shall be arranged to drain and shall be _ for use in wet locations suitable 57 | P a g e a branch circuit voltage that exceeds 277 volts to ground and does not exceed 600 volts between conductors is used to wire the auxiliary equipment of electrical discharge lamps mounted on poles the minimum height of these luminaires shall not be less than _ feed 22 receptacles connected to circuits having different _ on the same premises shall be of such design that the attachment plugs used on these circuits are not interchangeable 1 2 and 3 current frequencies voltages a 120 volt single phase 300ft branch circuit carries 5 amps and has a voltage drop of 5.0 what is the resistance of the conductors per foot in this circuit ? .003 ohms a 175 KVA single phase transformer having secondary voltage of 120/240 has been installed at a multifamily dwelling the current available at the secondary is _ 729 amps Three-way and four-way switches shall be wired so that all switching is done _____. only in the ungrounded circuit conductor at least one receptacle outlet shall be installed directly above a show window for each _ ft or major fraction thereof of show window area measured horizontally at its maximum width 12 where outdoor lamp holders have terminals that puncture the insulation and make contact with the conductors they shall be attached only to _ conductors of the stranded type determine the voltage drop on a branch circuit given the following current =5 length =300ft resistance = 4ohms/1000 ft 6 volts the total rating of utilization equipment fasted in place other than luminaires shall not exceed _ percent of the branch circuit ampere rating where lighting units cord and plug connected utilization equipment not fasted in place or both 50 determine the resistance in ohms of a 100watt 120 volt incandescent light bulb 60 | P a g e receptacle outlet give: you have a 2 gang box that contains two single pole switches unless the box is equipped with permanently installed berries the voltage between the switches shall not be in excess of _ volts 300 receptacles connected to circuits having different voltages frequencies or types of current on the _ shall be of such design that the attachment plugs used on these circuits are not interchangeable same premises means shall be provided to simultaneously disconnect the _ of all fixed electric space heating equipment from all ungrounded conductors 1 3 4 only heater motor controllers supplementary overcurrent protective devices the air handling area beneath raised floors for information technology equipment _ a plenum and _ required to comply with the requirement's of 300.22 but shall be permitted in accordance with article 645 is not /is not conductors of ac and dc circuits rated 1000 colts nominal or less shall be permitted to occupy the same equipment wiring enclosure if _ all conductors have an insulation rating equal to at least the maximum circuit voltage applied to any conductor within the enclosure a _ branch circuit consists of two or more ungrounded conductors that have a voltage between them and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system multiwire luminaires shall not be used as a raceway for circuit conductors unless _ for use as a raceway 1 and 3 listed marked No handhole shall be required in a pole supporting a luminaire that is ___ ft or less in height abovegrade where the supply wiring method continues without splice or pull point, and where the interior of the pole and any splices are accessible by removing the luminaire. 8 luminaires installed in recessed cavities in walls or ceiling shall be sintalled so that adjacent combustible material will not be subjected to tempuratures in excess of _ degrees C 61 | P a g e 90 Luminaires shall be wired with conductors having insulation suitable for the ___ to which the conductors will be subjected. 1 2 &3 environmental conditions current voltage temp lamps for outdoor lighting shall be below all _ transformers or other electrical utilization equipment energized conductors heavy duty lamp holders shall have a rating not less than _ watts of the ad medium type and not less than _ watts of any other type 660 /750 luminaires attached to suspended ceiling framing shall be secured to the framing member with screws bolts rivets or _ clips identified for use with the type of ceiling framing members and luminaires involved listed flexible cords shall be secured to undersides of showcases so that _ 1 2 3 the free lead at the end of a group of showcases will have a female fitting not extending beyond the case wiring will not be exposed to physical damage a separation between cases is not in excess of 2" nor more than 12" between the first case and the supply receptacle branch circuits that supply neon tubing installations shall not be rated in excess of _ amps 30 thermal insulation shall not be installed within _ inches of the recessed luminaire enclosure 3 unless the outlets box is listed and marked for the maximum weight to be supported a luminaire shall be supported independently of the outlet box if the weight exceeds _ pounds fifty _ luminaires surface mounted over concealment outlet pull or junction boxes and designed not to be supported solely by the outlet box shall be provided with suitable openings in the back of the luminaire to provide access to the wiring in the box 62 | P a g e electric discharge unless identified as suitable for use with infrared heating lamps screw shell lampholders shall not be used with infrared lamps over _ watts rating 300 the screw shell contact of lamp holders in grounded circuits shall be connected to the _ conductor grounded in an area used for patient care the grounding terminals of all receptacles and all non current carrying conductive surfaces of fixed electrical equipment likely to become energized that are subject to personal contact operating at over _ shall be connected to an insulated copper EGC 100 volts Aircraft energizers shall be designed and mounted so that all electric equipment and fixed wiring will be at least ___ in. above floor level. 18 in each conduit run leaving class 1 division 2 location the sealing fitting must be located within _ feet of the boundary 10 The ampacity of supply branch circuit conductors and the current rating of all the current protective devices for x-ray equipment shall not be less than _ of the momentary rating or _percent of the longtime rating, whichever is greater 50%/100% separation of ground fault protection time current characteristics shall conform to _ recommendations in health care facilities manufacturers of the required number of receptacles in critical care area operating room at least _ of these shall be connected to the normal system branch circuit or to a critical branch circuit supplied by a different transfer switch than the other receptacles at the same location 12 the line isolation monitor in a health care facility shall not alarm for a fault hazard of less than _ mA or for a total hazard current less than _ mA 3.7//5 class 2 locations are the those that are hazardous because of _ the presence of combustible dust 65 | P a g e both persons electrically conductive objects parking garages are considered to be _ locations unclassified the area withing 5 feet horizontally from aircraft power plants or aircraft fuel tanks shall be classified as class 1 division 2 or zone 2 location that shall extend upward from the floor to a level 5 feet above the _ upper surface of the aircraft wings and engine enclosures which of the following wiring methods is approved for use as fixed wiring in an area above class 1 locations in a major repair garage all of these TC MC MI cable in aircraft hangars any pit or depression below the level of the hangar floor shall be classified as a _ class 1 division 1 aboveground storage tanks shall eb classified _ for the space between 5 ft and 10 ft from the open end of a vent extending in all directions class 1 division2 In bulk storage plants, aboveground tank vents shall be classified as ___ within 5 ft (1.5 m) of the open end of the vent, extending in all directions. class 1 division 1 The NEC considers the area around the motor fuel dispensing pumps of a service station to be a hazardous location. This area extends a height of 18 inches above grade, and within _ feet horizontally measured from a point vertically below the edge of any dispenser enclosure 20 the patient care space is any portion of a health care facility where patients are intended to be _ 1 or 2 only examined treated each critical care areas patient bed location shall be provided with at least _ receptacles 14 receptacles located within the patient rooms bathrooms playrooms activity rooms and patient care Ares of pediatric units shall be listed tamper resistance or shall employ a listed _ cover 66 | P a g e tamper resistant a minimum of _ receptacls shall be provided in critical care area operating room 36 _ shall be provided at a patient bed locations used for general care in a hospital all of these a normal system circuit receptacles with a distinctive color a critical branch circuit the equipment grounding terminal buses of the normal and essential branch circuits panelboards serving the same individual patient care vicinity shall be connected together with an insulated continuous copper conductor not smaller than _ awg 10 when supplied from the essential electrical system _ shall have a distinctive color or marking so as to be readily identifiable electrical receptacle cover plates _ in which failure of equipment or a system is likely to cause minor injury to patients staff or visitors general care spaces in an area used for patient care type MC cables shall have an outer metal sheath that is _ as an acceptable grounding return path 1 and 2 only listed identified where used for essential electrical system branch circuits that supply patient care areas of a hospital permitted wiring methods include _ type MI cable in a health care facility the life safety and critical branches shall be installed and connected to the alternate power source so that all functions supplied by these branches specified here shall be automatically restored to operation within _ after interruption 10 seconds for services exceeding 1000 volts nominal the _ switch shall be accessible to qualified persons only isolating 67 | P a g e according to the NEC the two mandatory branches of the hospital essential system are _ the life safety branch and the critical branch emergency system transfer equipment including automatic transfer switches shall be _ all of these approved by the AHJ identified for emergency use automatic in a health care facility low voltage equipment that is frequently in contact with the bodies of persons or has exposed current carrying elements shall operate on a voltage of _ colts or less if the equipment is not approved as intrinsically safe double insulated or moisture resistant 10 a _ is a system of feeders and branch circuits supplying power for lightening receptacles and equipment essential for life safety that is automatically connected to alternate power sources by one or more transfer switches during interruption of the normal power source lifesafety branch emergency lighting emergency power or both must be available in a building within a time not to exceed _ seconds ten which of the following shall be installed on the critical branch of the emergency system in a health nurse call systems emergency circuit wiring shall be permitted to enter which of the following types of equipment with normal circuit wiring? 1 and 2 only transfer switches exit or emergency luminaires supplied from two sources the _ branch is a system of feeders and branch circuits arranged for delayed automatic or manual connection to the alternate power source and that serves primarily 3 phase power equipment equipment a hospital isolated power system can be a system powered by _ an isolating transformer or line isolation monitor A _ is any area of the facility that has been designed to be used for the administration of any flammable inhalation anesthetic agents in the normal course of examination or treatment flammable anesthetizing location 70 | P a g e All 125 volt receptacles located within --- from the inside walls of a permanently installed pool shall be protected by a Class A ground fault circuit interrupter. 20 In closed construction of manufactured buildings, cables shall be permitted to be secured only at cabinets, boxes, or fittings where ___ or smaller conductors are used and protection against physical damage is provided. 10 what is the maximum distance that a disconnect can be located from the operators station for a carnival ride? 6 ft in exhibition halls used for display booths as in trade shows the temporary wiring shall be permitted to be installed in accordance with article _ 590 590 For a touring circus, continuity of the equipment grounding conductor system shall be verified ___. each time that portable electrical equipment is connected a theater stage switchboard is used primarily to feed stage equipment and can contain _ dimmers or relays with associated overcurrent protective devices or overcurrent protective devices alone all of these: dimmers relays fuses Lamps in cellulose nitrate film storage vaults shall be installed in rigid luminaires of the ___ type. 1 and 3 only glass enclosed gasketed a _ is an assembly cable containing one male and two female cord connectors used to connect two loads to one branch circuit two-fer Portable amusement rides and amusement attractions shall be maintained not less than ___ feet in any direction from overhead conductors operating at 600 volts or less, except for the conductors supplying the amusement ride or attraction. 15 71 | P a g e fixed stage switchboards shall be permitted to supply power to _ both stage equipment non stage equipment a place of assembly is a building or portion of building designed or intended for the assembly of _ or more persons 100 When 10/2 AWG with ground type SO cord is used to supply border lights in a theater, the cable has an ampacity of ___ amps. 30 Outdoor mobile home disconnecting means shall be installed so the bottom of the enclosure containing the disconnecting means is not less than ___ ft above finished grade or the working platform. 2 ft the power supply cord to a mobile home must not be longer thatn _ feet 36 1/2' recreational vehicle site services and feeders for sites with 50 amp supply facilities are calculated not less than _ 12000 VA Every recreational vehicle site with electrical supply shall be equipped with recreational vehicle site supply equipment with at least ___ 20-ampere, 125-volt weather-resistant receptacle. one a _ is a building unit as defined in article 100 that floats on water is moored in a permanent location and has a premises wiring system served through connection by permanent wiring to an electrical supply system not located on the premises floating building a _ is any building that is of closed contruction and is made or assembled in manufacturing facilities on or off the building site for installation or for assembly and installation on the building site other than manufactured home mobile homes park trailers or recreational vehicles manufactured building the power supply to the mobile home shall be a feeder assembly consisting of not more than one listed _ amp mobile power supply cord with an integrally molded or securely attached plug cap or a permanently installed feeder 50 72 | P a g e in a recreational vehicle park with electrical supply at least _% of the sites shall be equipped with 30 amp 125 volt receptacles 70 All cables installed in agricultural buildings shall be secured within ___ in. of each cabinet, box, or fitting. 8 in a recreational vehicle park what percentage of the spaces supplied with electricity must have 10 amp 125 volt receptacles 70 % no luminaires shall be installed in swimming pools for operation on supply circuits over _ volts between conductors 150 A junction box connected to a conduit that extends directly to a forming shell shall be provided with _ grounding terminals where 3 conduits enter the j box 4 hydromassage bathtubs and their associated electrical components shall eb connected to _ branch circuits an individual Storable swimming pools are capable of holding water to a maximum depth of ___ in. 42 a wet-niche swimming pool luminaire is supplied by a 14 awg flexible cord and protected with a 15 amp gfci breaker the minimum size equipment grounding conductor required is _ awg 14 luminaries located in the same room and not directly associated with a hydromassage bathtub shall be installed accordance with the requirements covering the installation of that equipment in _ bathrooms All fixed metal parts that are within ___ ft horizontally of the inside walls of a permanently installed swimming pool must be bonded together 5 for pool equipment _ shall be grounded all three ground fault circuit interrupters 75 | P a g e emergency system equipment shall be designed and located so as to minimize the hazards that might cause complete failure due to flooding fires and _ both ice and vandalism an automatic transfer switch in the _ mode allows two power sources to be paralleled indefinitely with no power interruption to the load in the event of power loss from either source soft load equipment grounding conductors for PV source and PV output circuits shall be sized in accordance with _ 250.122 a disconnecting means shall be provided for all ungrounded conductors derived from a stationary battery system with a voltage over _ volts dc 60 where bypass isolation switches are used on emergency system transfer equipment inadvertent _ operation shall be avoided parallel emergency systems as classified by the AHJ would generally be required for which generally be required for which of the following all of these 911 communication systems elevators in hospitals exit and egress lighting in hotels transfer equipment for emergency systems shall be designed and installed to prevent the inadvertent interconnection of _ sources of supply in any operation of the transfer equipment normal and emergency audible and visual signal devices on emergency systems transfer equipment shall be provided where practicable for _ all of these when emergency system power generators are out of service for major maintenance or repair _ shall be available a temporary or portable alternate source optional standby systems classified by the AHJ would generally be required for which of the following all of these HVAC in office buildings 76 | P a g e refrigeration equipment in food stores computer equipment in office buildings for emergency systems where internal combustion engines are used as the prime move an on site fuel supply shall have sufficient fuel supply for not less than _ hours on full demand 2 A typical standby system ATS ___. all of these a vessel that holds the plates electrolyte and other elements of a single unit in a battery is known as a _ container storage batteries other than lead acid batteries shall be _ listed for battery chemistries with _ electrolyte the structure that supports the battery shall be resistant to deteriorating action by the electrolyte corrosive which of these grounding configurations is not permitted for PV systems high resistance grounded a complete environmentally protected unit consisting of solar cells and other components designed to produce dc power is known as a _ module for determining the maximum voltage of a PV source circuit PV systems with an inverter generating capacity of _ KW or greater a documented and stamped PV system using an industry standard method maximum voltage calculation provided by a licensed professional engineer shall be permitted 100 the pv system disconnecting means shall be in a location that is _ readily accessible a rapid shutdown switch for pv systems have a label located on or no more than _ feet from the switch 3 a pv isolating device shall be permitted to be a finger safe _ fuse holder PV modules intended for use in PV systems shall be _ be evaluated for the application and have a field label applied 77 | P a g e listed mating connectors for PV equipment shall be polarized and shall have a configuration that is _ with receptacles in other electrical systems on the premises noninterchangeable the maximum inverter output circuit current shall be the inverter _ output current rating continuous photovoltaic systems with PV system dc circuits operating at _ volts DC or greater between any two conductors shall be protected by a listed PV arc fault circuit interrupter or other system components listed ro provide equivalent protection 80 a device installed in a PV source circuit or PV output circuit that can provide an output dc voltage and current at a higher or lower value than the input dc voltage and current is known as a _ dc to dc converter bus or conductor ampere rating the power source output circuit current multiplied by _ percent shall be used in amp calcs for 705.12(B)(1) through (3) 125 Where interconnected electric power production sources supply, equipment containing _____ devices in circuits supplying power to a busbar or conductor supplied from multiple sources shall be marked to indicate the presence of all sources. overcurrent overcurrent protection for interconnected electric power production source conductors connected to the supply side of the service disconnect means for a dwelling shall be located within _ feet of the point where the electric power production source conductors are connected to the service 10 installation of electrical power production sources operating in parallel with primary sources of electricity shall be performed _ by qualified persons only what is the VA input of a fully loaded 5 hp 230volt single phase motor 6440 which one of the devices listed is not permitted to be used to provide branch circuit and Shor circuit protection for motors knife switch 80 | P a g e synchronous motors of the low torque los speed type such as are used to drive reciprocating compressors pumps and so forth that start unloaded do not require a fuse rating or circuit breaker setting in excess of _ percent of full load current 200 Where the motor-control circuit transformer rated primary current is less than 2 amperes, an overcurrent device rated or set at not more than ___ of the rated primary current shall be permitted in the primary circuit. 500 Several motors, each not exceeding 1 horsepower in rating, shall be permitted on a nominal 120-volt branch circuit protected at not over ___ amperes. 20 The full-load current of a 25-horsepower, synchronous 460-volt, 3-phase, motor is ? . 26 A 50 hp 230-volt, 3-phase squirrel cage motor has a full-load current of ___ amps. 130 A 14 AWG THHN copper conductor is used between a motor starter and a remote start/stop station. What is the maximum size circuit breaker permitted for the motor short-circuit ground-fault protection that will also protect the 14 AWG conductor? 45 amp For a nonautomatically started motor, the overload protection shall be permitted to be shunted or cut out of the circuit during the starting period of the motor if the device by which the overload protection is shunted or cut out shall not be left in the starting position and if fuses or inverse-time circuit breakers rated or set at not over ___ of the full-load current of the motor are located in the circuit so as to be operative during the starting period of the motor. 400 determine the minimum size overload protection required for a 480v 3phase 15hp continuous duty motor given the following information design B service factor 1.12 temp rise -40C actual nameplate rating 18 amps 20.7 81 | P a g e disregarding exceptions what is the minimum number of overload delta systems and fuses are used for motor overload protection is omitted the rating of the attachment plug and receptacle shall not exceed _ or 250 volts 15 amps at 125 volts when a continuous duty motor one horsepower or more but not marked with a service factor or temp rise is protected by a seperate overload device the device shall be selectied to trip at no more than _ percent of the motor nameplate rating 115 determine the maximum current setting permitted for overload protection for a motor that has a thermal protector integral with themotor given the following info 7 1/2 hp wound rotor 2 phase 4 wire ac 230 votls 29.6 amps the secondary circuits of wound rotor ac motors including conductors controllers resistors and so forth shall be permitted to be protected against overload by the _ motor overload device what is the demand factor for five household clothes dryer 85% A single piece of equipment consisting of a multiple receptacle comprising four or more receptacles shall be computed at not less than ___ per receptacle. 90 VA It shall be permissible to apply a demand factor of ___% to the nameplate rating load of 4 or more fastened in place water heaters in a multifamily dwelling 75% where fixed multioutlet assemblies are employed each _ feet or fraction thereof of each separate and continuous length shall be considered as an outlet of not less than 180 volt amps where the connected appliances are unlikely to be used simultaneously 5 when service entrance conductors exceed 1100 kcmil copper the required grounded conductor must be sized not less than _ percent of the area of the largest phase 12.5 82 | P a g e the minimum number of 20 amp 277 volt lighting circuits required for a 150,000 sqft store is _ the actual load is 400kVA 91 for warehouses after the first 12.5 kVA the remainder of the lighting load demand is calculated at _ percent 50 the load for a required sign branch circuit shall be computed at a minimum of _ 1200 VA for a feeder supplying household electric ranges the maximum unbalanced load shall be considered as _ % of the load on the ungrounded conductor s 70 under the optional method for a single family dwelling general loads beyond the initial 10 kW are calculated at a _ percent demand factor 40 what is the minimum demand load for general purpose receptacles in an office building that has 150 receptacles 18500 VA application of demand factors to small appliance and laundry loads in dwellings are permitted in table _ 220.42 a single family dwelling unit has three ovens rated at 6, 8, and 3.5kW a cooktop rated at 6 kW and broiler rated at 3.5 kW the minimum demand factor to be calculated for the ungrounded service entrance conductors is _ 12.2kW which of the following is not true concerning the optional method for a dwelling unit? the optional method of calculation is permitted if the service entrance conductors have an ampacity of 200 or greater the demand factor for six residential clothes dryers in multifamily dwelling unit is _ 75% which of the following is not true? a demand factor from 220.55 could be applied to a 1 3/4 kW wall mounted oven is an apartment complex has a lighting load of 205.4 kVA what is the demand factor of this lighting load in kVA? each apartment contains an electric range 85 | P a g e requires an EOL device For a fire alarm system, the FACP ___ .I. requires a 120-Vac dedicated circuit as its power supply II. breaker must be marked red in color III. breaker must be labeled Fire Alarm Control Unit 1 2 and 3 the purpose of turning off air handlers when fire control equipment is activated is to _ prevent the spread of deadly gases in a fire alarm system notification devices _ receive outputs from the FACP nfpa 101 is the _ life safety code the purpose of turning on exhaust fans when fire control equipment is activated is to _ remove deadly gases from the area To avoid panic in occupancies such as hospitals when a fire alarm system is activated, ___ to alert trained personnel. chimes or other special signaling systems are utilized a fire alarm system is designed in accordance with _ NFPA 101 a fire alarm system _ all of these may controls building operation to reduce the spread of smoke and fire is a life safety device responds to manual and or detection of fire the purpose of releasing magnetic locking mechanisms on exit doors when fire control equipment is activated is to _ allow people to exit the building A dual-action fire alarm pull station ___. requires two hand actions to operate the station as part of the fire alarm system a horn/ strobe provides _ to aler building occupants that a fire alarm has been activates 86 | P a g e both sound and light a _ is an example of a fire alarm system notification device horn strobe when installing FPL cable underground for a fire alarm system the cable _ when it is listed for direct burial either must contain an EGC when installed in PVC or can be directly buried the installation of a fire alarm system requires a plenum cable to be run above the lay in ceilings which is acceptable? 2 or 4 only CMP FPLP a fire alarm system monitors the circuit cables connected to it and causes a trouble signal when a break in the wiring is detected for a fire alarm system this circuit monitoring is referred to as _ supervision when installing a fire alarm system survivability cable is typically used in a _ hospital hospital which of the following can be utilized by a conventional fire alarm system?> 1 or 2 only class A IDCs class B IDCs a _ is a fire alarm system that is connected through leased telephone lines to a municipal communication center remote supervising fire alarm system For an addressable fire alarm system, the SLCs and devices addresses are supervised by verifying the address of each device. The device address data is polled by the fire alarm panel Central Processing Unit (CPU) at least every ___. 90 seconds a _ fire alarm system groups notification devices into zones 87 | P a g e conventional for a fire alarm system utilization the same dvice layout a _ system requires fewer total feet of cable addressable a local energy type auxiliary fire alarm system uses power provided by the _ protected premise before working on an existing and active fire alarm system you should notify the _ all of these owner tenants monitorying company when working on an existing disabled fire alarm system you should _ both test all wiring before making any terminations at the panel test the system for proper operation before re-enabling it after rpairs have been made to an existing fire alarm system you should put the system back on line _ notifications are made before