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Questions & Answers (Grade A+)
For other than one-and two-family dwellings, when building a new electrical service, at least one (1) 125- volt, single-phase, 15- or 20-ampere-rated receptacle outlet shall be located within at LEAST _____ of the electrical service equipment? - correct answer ✅50 feet The ampacity of a conductor is defined by the NEC to be the maximum current, in amperes, a conductor can carry continuously under the conditions of use without exceeding ______? - correct answer ✅it's temperature rating Disconnect switch enclosure installed in a Class II, Division 2 location shall be listed as _____? - correct answer ✅dusttight The interior of enclosures or raceways installed underground shall be considered as a _____ location? - correct answer ✅dry Determine the MAXIMUM allowable current-carrying capacity of four (4) size 1/0 AWG THW copper current- carrying conductors installed in a common raceway
Questions & Answers (Grade A+)
with an ambient temperature of 86 degrees F? - correct answer ✅120 amperes The NEC defines a continuous load to be a load where the maximum current on the circuit is expected to continue for at LEAST____ hours or more? - correct answer ✅three The service disconnecting means for each electrical service shall consist of NOT more than _____ switches or circuit breakers, mounted in a single enclosure or in a group of separate enclosures. - correct answer ✅six Given: You have determined a conductor has a computed allowable ampacity of 75 amperes. What is the MAXIMUM standard ampere rating of the overcurrent protection device the NEC® permits to protect this circuit where this is not a motor circuit or part of a multioutlet branch circuit supplying more than one receptacle? - correct answer ✅80 amperes
Questions & Answers (Grade A+)
conduit termination? - correct answer ✅12 inches Where a pull box to be installed will contain conductors of size 4 AWG and larger, and a straight pull of the conductors is to be made, the length of the box shall NOT be less than ____times the trade diameter of the largest conduit entering the box. - correct answer ✅eight Conduit nipples not over 24 inches in length may be filled to a MAXIMUM of _____ of their cross-sectional area. - correct answer ✅60 percent Determine the MAXIMUM number of size 14 AWG THHN conductors permitted to be installed in a trade size 3/8 in. flexible metal conduit (FMC) that contains a bare size 14 AWG grounding conductor, when the FMC has external fittings. - correct answer ✅four Which one of the following listed conduits does the NEC® permit to enclose conductors supplying wet-
Questions & Answers (Grade A+)
niche underwater pool luminaires? - correct answer ✅Schedule 40 rigid polyvinyl chloride conduit (PVC) Underground wiring is not permitted under a permanently installed swimming pool or within _____ of the pool, unless the wiring is supplying the associated pool equipment. - correct answer ✅5 feet Which of the following listed types of batteries is NOT permitted for use as a source of power for emergency systems? - correct answer ✅automotive In regard to electric space heating equipment, heating cables shall be furnished complete with factory- assembled nonheating leads at LEAST _____ in length.
correct answer ✅7 feet In guest rooms of hotels, motels, and sleeping rooms of dorms a MINIMUM of _____ general purpose receptacles installed in the room is/are required to be
Questions & Answers (Grade A+)
All motors shall be considered as _____ unless the nature of the apparatus it drives is such that the motor will not operate continuously. - correct answer ✅continuous duty Where the motor controller also serves as a disconnecting means, it shall open all _____ conductors to the motor. - correct answer ✅ungrounded Before demand factors are taken into consideration for commercial buildings, general-purpose receptacle loads are to be computed at NOT less than _____ per outlet. - correct answer ✅180 VA Conductors with ______ insulation have a greater ampacity when used in a dry location compared to when used in a wet location. - correct answer ✅THHW
Questions & Answers (Grade A+)
Where a submersible pump is housed in a metal well casing, the well casing shall be _____ the pump circuit equipment grounding conductor? - correct answer ✅connected to A single-phase, 125-volt receptacle installed to serve a washing machine in the laundry room of a dwelling unit must be installed within at LEAST ______ of the intended location of the appliance? - correct answer ✅6 feet When ambient temperature is not a factor, a size 8 AWG single copper conductor with type FEPB insulation, installed in free air, will have a MAXIMUM allowable ampacity of _____? - correct answer ✅80 amperes For the purpose of determining conductor fill in a device box, a single-pole switch and/or a three-way switch is counted as equal to _____ conductor(s), based on the largest conductor connected to the switch. - correct answer ✅two
Questions & Answers (Grade A+)
liquid-produced vapors are or may be present in the air in quantities sufficient to produce explosive or ignitible mixtures? - correct answer ✅I In indoor areas where walls are frequently washed, such as laundries or car washes, metallic conduit and metallic panelboards shall be mounted with a MINIMUM _____ space between the wall and conduit or panelboard when the equipment is installed exposed?
correct answer ✅1/4 in. A branch circuit supplied by size 12 AWG conductors is a _____ rated branch circuit when protected by a 15- ampere circuit breaker? - correct answer ✅15 ampere What is the MAXIMUM overcurrent protection allowed for the protection of resistance-type electric space heating equipment? - correct answer ✅60 amperes
Questions & Answers (Grade A+)
Information technology equipment shall be permitted to be connected to a branch circuit by a listed power- supply cord having a length NOT to exceed _____. - correct answer ✅15 feet All 125-volt, single-phase, 15- or 20-ampere receptacle outlets installed within at LEAST _____ of the outside edge of a dwelling unit bathtub or shower stall require GFCI protection. - correct answer ✅6 feet The purpose of an intersystem bonding termination is to provide a means for connecting _____ to the grounding electrode system. - correct answer ✅bonding conductors for communications systems Direct-buried conductors emerging from grade shall be protected by raceways or covers up to at LEAST _____ above finished grade. - correct answer ✅8 feet What is the MINIMUM size wire type equipment grounding conductor for a 50 ampere branch circuit as
Questions & Answers (Grade A+)
NOT exceed _____? - correct answer ✅6 feet Where a trade size 1/2 in. rigid metal conduit (RMC) is installed in a Class I location and a 1/2 in. conduit seal is required, the MINIMUM thickness of the sealing compound shall NOT be less than _____? - correct answer ✅5/8 in. In dwelling units, all 125-volt, single-phase, 15- or 20- ampere receptacle outlets installed within six (6) feet of the outside edge of a sink in a laundry room shall be provided with _____. - correct answer ✅both GFCI protection and AFCI protection A 30 hp, 480-volt, 3-phase wound-rotor, ac motor has a full-load running current rating of _____. - correct answer ✅40 amperes In regard to residential occupancies, the branch- circuits supplying 125-volt, single-phase, 15- or 20- ampere receptacles in a garage _____. -
Questions & Answers (Grade A+)
correct answer ✅shall not supply any other outlets outside of the garage When conductors of different systems are installed in the same raceway, one system grounded conductor shall be white or gray. The other system grounded conductor shall be _____. - correct answer ✅white or gray with an identifying colored stripe that is not green What MAXIMUM percent of a metal wireway cross- section may be occupied by splices, taps and conductors at any point? - correct answer ✅75 percent In an underground installed rigid polyvinyl chloride conduit (PVC) system that consist of 50 feet length between pulling points, what is the MAXIMUM number of bends this run may have? - correct answer ✅four (4) - 90 degree Grounding electrodes made of pipe or conduit shall NOT be smaller than _____ electrical trade size. - correct answer ✅3/4 in.
Questions & Answers (Grade A+)
For an ac system operating at less than 1000 volts, a main bonding jumper shall connect the grounded conductor(s) to _____. - correct answer ✅each service disconnecting means enclosure In industrial establishments, where sizes 1/0 AWG through 4/0 AWG single conductor cables are installed in ladder type cable tray, the MAXIMUM allowable rung spacing for the cable tray shall be _____. - correct answer ✅9 inches A single-gang, 1 in. deep, Type FS box is permitted to house no more than _____ size 12 AWG conductors. - correct answer ✅six In general, which of the following receptacle outlets in a commercial kitchen are required by the NEC® to be GFCI protected? - correct answer ✅All 125-volt, 15- or 20-ampere receptacles. What is the MINIMUM size copper SE cable with type THHW insulation that may be used as ungrounded
Questions & Answers (Grade A+)
(phase) service-entrance conductors for a 150-ampere rated, 120/240-volt, single-phase residential service? - correct answer ✅1 AWG Branch-circuit conductors supplying more than one motor shall have an ampacity of at LEAST_____ of the full-load current rating of the highest rated motor in the group, and 100 percent of the full-load current rating of the other motor(s) in the group. - correct answer ✅125 percent What is the MINIMUM size equipment grounding conductor required for a 5 hp, 3-phase, 208-volt motor having 20-ampere rated overload protection and branch-circuit, short-circuit and ground-fault protection rated 30-amperes? - correct answer ✅10 AWG Where a circuit breaker serves as the controller for a motor, and the motor is not in sight of the breaker, the NEC® requires which of the following? - correct answer ✅The circuit breaker is to be capable of being locked in the open position.
Questions & Answers (Grade A+)
In a health care facility, a patient bed location in a critical care area is required to have which of the following? - correct answer ✅Fourteen single receptacles or seven duplex receptacles. When intermediate metal conduit (IMC) is threaded in the field, a standard cutting die with a _____ taper per foot shall be used. - correct answer ✅3/4 in. Electrically heated floors in bathrooms, kitchens, and in hydromassage bathtub locations shall be _____. - correct answer ✅GFCI protected Which of the following methods is an acceptable marking for the grounding pole on a grounding type receptacle? - correct answer ✅A green colored hexagonal headed or shaped terminal screw.
Questions & Answers (Grade A+)
What is the MAXIMUM length of a flexible cord that may be used for a recirculating pump motor on a swimming pool at a dwelling? - correct answer ✅3 feet Plate grounding electrodes shall be installed NOT less than _____ below the surface of the earth. - correct answer ✅30 inches A disconnecting means shall be provided on the supply side of all fuses in circuits having a voltage of at LEAST _____ to ground. - correct answer ✅150 volts Where an 80-ampere, 240-volt, single-phase load is located 200 feet from a panelboard and is supplied with size 3 AWG copper conductors with THWN insulation, what is the approximate voltage-drop on the circuit? (K = 12.9) - correct answer ✅7.84 volts Enclosures in a Class I, Division 1 location containing components that have arcing devices must have an approved seal located within at LEAST _____ of each
