Dewalt Exam Guide Exam #2

Metal conduit installed in indoor wet locations must have a MINIMUM airspace clearance of ________ between the conduit and the wall or supporting surface.

1/4 inch 300.6(D)

When an electrical trade size 3/4 inch electrical metallic tubing (EMT) is in excess of 24 inches in length, the conduit is permitted to contain NO more than _________ size 10 AWG conductors with THWN insulation.

10 Annex C, C.1

As a general rule, branch-circuit conductors that supply a single AC motor used in continuous-duty application shall have an ampacity of NOT less than __________ percent of the motor's full-load running current rating.

125 430.22

In general, branch-circuit conductors serving continuous loads, such as luminaires in an office building or any commercial establishment, shall have an ampacity of NOT less than ________ of the load.

125 percent 210.19(A)(1)(a)

Disregarding exceptions, the overcurrent protection for size 12 AWG copper conductors, regardless of the insulation type shall NOT exceed ________.

20 amperes 240.4(D)(5)

Given: A 9 kW rate 208-volt, 3 phase electric steamer is to be installed in the kitchen of a commercial establishment; the steamer will draw ________ of current.

25 amperes

When exceptions are not consideration, electrical metallic tubing (EMT) shall be securely fastened within ________ of each junction box, panelboard, or other conduit termination

3 feet 358.30(A)

How much clear working space is required to be maintained between a 3-phase 480Y/277-volt main switchboard and a concrete block wall?

3 feet, 6 inches 110.26(A)(1)

The MINIMUM required width of the working space in front of panelboards, switch boards, disconnects, and motor controllers, rated 1000 volts or less, shall be the width of the equipment or NOT less than _________, whichever is greater.

30 inches 110.26(A)(2)

The current load on a size 8 AWG THHN 90C copper conductor is limited to________ where connected to a disconnected switch with terminals rated 60C.

40 amperes 110.14(C)

Generally, the ampacity of a size 8 AWG THWN copper conductor is ___________.

50 amperes 310.15(B)(16)

The NEC permits electrical trade size 3/8 inch flexible metal conduit (FMC) to be used for tap conductors (fixture whips) to luminaires, provided the length of the FMC does not exceed ______________.

6 feet 348.20(A)(2)c

Unless listed and identified otherwise, terminations and conductors of circuits rated 100 amperes or larger shall be rate at __________.

75C 110.14(C)(1)(b)(1)

Given: An electrical metallic tubing (EMT) 50 feet in length to be installed will contain a total of 9 conductors. 6 of these wires are considered to be current-carrying. What is the adjustment factor, in percent, that must be applied to the ampacity of the current-carrying conductors?

80 percent 310.15(B)(3)(a)

Where branch-circuit conductors supplying a fluorescent or HID luminaire are contained within the ballast compartment and are within 3 in. of the ballast, the conductors are required to have an insulation temperature rating NOT lower than__________.

90C 410.68

When inverse time circuit breakers are used to switch 120-volt and 277-volt, high-intensity discharge lighting branch-circuit, the circuit breakers shall be listed and marked ___________.

HID 240.83(D)

As a general rule, where the ampacity of a specific conductor does not match the rating of a listed standard overcurrent device, __________ of the NEC permits the use of the next standard overcurrent where loads are 800 amperes or less.

Section 240.4(B)

A motor with nine leads coming out of it is a _____________ motor.

dual-voltage

When an insulated black-colored conductor is identified by 3 continuous white or gray stripes along its entire length , it is considered a/an ____________.

grounded conductor 200.7(A)(2)

The reason the NEC requires all grounded and ungrounded conductors of a common circuit to be installed together in the same ferrous metal raceway is to reduce________.

inductive heat 300.20(A)

For continuous-duty motors, the motor nameplate current rating is used to determine the size of the _________ required for the motor.

motor overload protection 430.6(A)(2)

Under normal conditions, an equipment grounding conductor will ___________.

not carry current

On a four-wire, delta-connected system, the conductor having the higher voltage to ground (high-leg) shall be identified as _________ in color, if the grounded conductor is also present to supply lighting or similar loads.

orange 110.15

Where the premises wiring systems has branch-circuits supplied from more than one nominal voltage system, each undergrounded conductor of a branch-circuit shall be identified by _________ at the panelboard.

phase and system 210.5(C)(1)

Electrical equipment rooms or enclosures housing electrical apparatus of not over 1,000 volts that are controlled by a lock(s) shall be considered accessible to ___________.

qualified persons only 110.26(F)