Electrical License
30 inches
A plate-type grounding electrode shall be installed below the surface of the earth NOT less than _____.
3 AWG
Determine the MINIMUM size THW copper branch-circuit conductors required by the NEC® to supply a 3-phase, continuous-duty, AC motor that has a full-load current of 70 amperes. Assume all terminations to be rated at 75°C.
1¼ inches
Determine the MINIMUM trade size electrical metallic tubing (EMT) required to enclose eight (8) size 6 AWG copper conductors with THHW insulation, where installed in a 60 foot conduit run.
15 feet
Information technology equipment shall be permitted to be connected to a branch circuit by a listed power-supply cord NOT more than _____ in length.
1 foot
Receptacles supplying power to freestanding-type office furnishings shall be located NOT more than _____ from the furnishing that is connected to it.
120 amperes
Determine the MAXIMUM allowable ampacity of a size 1/0 AWG THW copper current-carrying conductor installed in a common raceway with three (3) other current-carrying conductors of the same size. Ambient temperature is 86°F.
21
Determine the MAXIMUM number of size 1 AWG XHHW compact conductors permitted in a trade size 3-inch, Schedule 40, rigid PVC conduit that is 100 feet long.
4
Determine the MAXIMUM number of size 14 AWG, THHN conductors permitted to be installed in a trade size 3/8 inch flexible metal conduit (FMC) that contains a bare size 14 AWG grounding conductor when the FMC has external fittings.
15 amperes
What is the MAXIMUM ampere rating permitted for a 125-volt, single-phase receptacle having a cord-and-plug connected motor load that does NOT have overload protection?
10 AWG
What is the MINIMUM size equipment grounding conductor required by the NEC® for a branch circuit protected by a 50-ampere rated circuit breaker?
8
When a pull box contains 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.
80
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 _____ amperes.
each time the equipment is connected
The continuity of the grounding conductor system used to reduce electrical shock hazards for portable electrical carnival equipment shall be verified
143 amperes
A 208-volt, 3-phase, 50 HP, squirrel-cage, continuous-duty, Design C, AC motor has a full-load running current of _____.
180
Before demand factors are taken into consideration for commercial buildings, general purpose receptacle loads are to be computed at NOT less than _____ VA per single or duplex receptacle.
I
Class _____ hazardous locations are those in which flammable gases, flammable liquid-produced vapors, or combustible liquid-produced vapors are or may be present in the air in quantities sufficient to produce explosive or ignitable mixtures.
III
Class _____ locations are those that are hazardous because of the presence of easily ignitable fibers or flyings.
178.2 amperes
Determine the conductor ampacity given the following related information: · conductors are size 500 kcmil copper· conductor insulation is THWN· eight (8) current-carrying conductors are in the raceway· ambient temperature is 125°F· conduit length is 75 feet· installation is a wet location
8 feet
Direct-buried conductors and cables emerging from grade shall be protected by raceways or enclosures up to at LEAST _____ above finished grade.
1000
Disregarding exceptions, all 3-phase, 277/480 volt, wye-connected electrical services require ground-fault protection for each service disconnecting means when rated at LEAST _____ amperes or more.
Type PD cord
Disregarding exceptions, all of the following wiring methods listed are permitted to be used as a feeder for temporary wiring on a construction site EXCEPT _____.
potential arc flash hazards
Electrical equipment such as distribution panelboards, motor controllers, and motor control centers that are located in other than dwelling units, and are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field or factory marked to warn qualified persons of _____.
5
For other than one-family dwellings, spas and hot tubs are required to have a clearly labeled emergency shutoff or control switch provided. This switch shall be installed at a point readily accessible to the users and NOT less than _____ feet away and within sight of the spa or hot tub.
an open porch
For the purpose of calculating the general lighting load for a dwelling unit, the floor area should include all of the following EXCEPT _____.
two
For the purpose of determining conductor fill in a device box, a switch is counted as equal to _____ conductor(s), based on the largest conductor connected to the switch.
80 amperes
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? This is not a motor circuit or part of a multi-outlet branch circuit supplying more than one receptacle.
12 inches
In Class II, Division 2, hazardous locations, where pendant mounted luminaires are suspended by rigid metal conduit (RMC) and a means for flexibility is not provided, the RMC stem shall have a length of NOT more than _____.
10
In a health care facility, low-voltage electrical equipment that is likely to become energized and is frequently in contact with the bodies of patients shall operate on a voltage of _____ volts or less if the equipment is not approved as intrinsically safe, double-insulated, or moisture-resistant.
the disconnecting means is in the open position
In general, motor control circuits shall be arranged so that they will be disconnected from all sources of supply when _____.
an insulated bushing
In general, when a size 4 AWG or larger insulated conductor enters a panelboard, cabinet, or enclosure, which of the following must be provided?
300 amperes
In general, when feeder conductors of not over 600 volts supply a continuous load of 240 amperes, the overcurrent protection device protecting this circuit shall have a MINIMUM rating of _____.
two
In guest rooms or guest suites of hotels and motels, and sleeping rooms in dormitories, at LEAST _____ general purpose receptacle(s) installed in the room is/are required to be readily accessible.
1 1/2 in.
Luminaires installed under metal-corrugated sheet roofing decking shall be installed and supported so there is NOT less than _____ clearance from the roof decking to the top of the luminaires.
6 feet, 6 inches
The MINIMUM height of headroom of working spaces above service equipment, switchboards and motor control centers shall be at LEAST_____ or the height of the equipment, whichever is greater.
60 amperes
The MINIMUM rating for a service disconnecting means for a building, other than a one-family dwelling, consisting of three (3) 2-wire circuits shall be _____.
wet location
The interior of enclosures or raceways installed underground shall be considered to be a _____.
1/2 inch
The internal depth of an outlet box used only to splice conductors to a luminaire and which does not enclose devices or utilization equipment shall NOT be less than _____.
time delay
The short-circuit and ground-fault protective device protecting the branch-circuit supplying an air-conditioner motor-compressor shall have sufficient _____ to permit the motor-compressor and other motors to start and accelerate their loads.
6
Type MI cable shall be supported at intervals NOT exceeding _____ feet.
90°C
When branch-circuit conductors supplying a luminaire are contained inside a ballast compartment and they are within 3 inches of the ballast, the conductors shall have a temperature rating of at LEAST _____.
1,200 volt-amps
When calculating the total load for a commercial building, what is the MINIMUM computed load, in volt-amps, required by the NEC® for a branch circuit supplying an exterior sign?
Table 430.250 of the NEC®
When determining the required ampacity of the branch-circuit conductors to supply an AC, three-phase, continuous-duty motor, current values of the motor given on _____ shall be used.
5/8 inch
Where a trade size ½-inch rigid metal conduit (RMC) is to be installed in a Class I location and a trade size ½-inch conduit seal is required, the MINIMUM thickness of the sealing compound inside of the completed seal shall NOT be less than _____.
1½ inches
Where an exposed outlet box is installed under metal-corrugated roof decking, a clearance of NOT less than _____ is to be maintained from the lowest surface of the roof decking to the top of the box.
12 inches
Where exceptions are not to be applied, liquidtight flexible metal conduit (LFMC) shall be securely fastened within at LEAST_____ of each box or other conduit termination.
a separate equipment grounding conductor shall be provided
Where the outer sheath of Type MI cable is made of steel _____.
Type NMC
Which of the following cables has an overall covering that is fungus resistant?
THHW
Which of the following conductor insulations have a greater temperature rating when used in a dry location compared to when used in a wet location?
All of these are permitted. Installation of a closure plate listed for the purpose by the manufacturer Installation of a spare or unused circuit breaker that fills the opening and is listed for the panelboard Installation of a closure plate or other device that fits securely and closes the opening
Which of the following is permitted for closing an unused circuit breaker opening in panelboards?
automotive
Which of the following listed types of batteries is NOT permitted for use as a source of power for emergency systems?