Dewalt Exam Guide Exam #1

The full-load running current of a 3-hp, 208-volt, single-phase, continuous-duty AC motor is

18.7 amperes 430.248

Where a 120-volt branch-circuit is to supply only fifteen 150-watt incandescent luminaires, what is the full-load current in the branch-circuit?

18.75 amperes

As a general rule, when a 20-ampere rated branch circuit supplies a single receptacle outlet, the rating of the receptacle must NOT be less then

20 amperes 210.21(B)(1)

In general, electrical nonmetallic tubing (ENT) shall be securely fastened at intervals NOT exceeding

3 feet 362.30(A)

What is the MAXIMUM overcurrent protection permitted for a size 10 AWG copper conductor with THHN insulation?

30 amperes 240.4(D)(7)

A 240-volt, single-phase, 10 kW rated commercial dishwasher has a full-load current rating of

42 amperes

A branch-circuit supplying a 7 1/2 hp, 240-volt, single-phase, induction type, continuous-duty, Design B, AC motor shall have an ampacity of at LEAST

50 amperes 430.6(A)(1)

What is the MINIMUM height of the working space required from the floor to the ceiling in front of a 480-volt, 3-phase, 400-ampere rated motor control center, disconnected switch, or main switchboard

6 feet 6 inches or the height of the equipment 110.26(A)(3)

When exceptions are not a consideration, all switches and circuit breakers used as switches shall be located so that they may be operated from a readily accessible place. They shall be installed so that the center of the grip of the operating handle of the switch or circuit breaker, when at its highest position, is NOT more then ___________ above the floor or platform.

6 feet, 7 inches 404.8(A)

In compliance with the NEC, a 4 inch 1 1/2 inch metal octagon box with a flat blank cover may contain a MAXIMUM of ____________ size 14 AWG conductors.

7 314.16(A)

Which one of the following listed circuit breakers is NOT a standard ampere rating listed in the NEC

75 amperes 240.6(A)

Where the copper conductors supplying the pervious referenced motor will have a temperature rating of 75C, determine the MINIMUM size as required by the NEC

8 awg 310.15(B)(16)

Which of the following fuses, if any, shall be used for replacement only in existing installations and not permitted for use in new installations?

I. Edison-base fuse and II. Class H renewable cartridge fuse 240.51(B) 240.60(D)

If the voltage-drop of a branch-circuit is too great, which of the following, if any, may be the result?

I. unsatisfactory illumination of lighting fixtures and II. overheating of a motor or unsatisfactory motor speed

Where more than 3 current-carrying conductors are installed in a raceway, the ampacity adjustment factors shown in ___________ of the NEC shall be applied

Table 310.15 b 3 a

When checking for continuity between a circuit breaker and the neutral bar of a panelboard when using a continuity tester, positive continuity is indicated. The reason may be that

a conductor is grounded or a luminaire or an appliance may be turn on

The portion of a wiring system that is between the final overcurrent device protecting the circuit and the outlets is defined as a

branch-circuit

Insulated neutral (grounded) conductors of size 6 AWG or smaller shall be identified

by a white or gray continuous outer finish 200.6(A)

The National Electrical Code (NEC) is Not

designed for future expansion of electrical use 90.1(A)&(B)

The NEC mandates specific branch-circuits, receptacle outlets, and utilization equipment to be provided with a ground-fault circuit interrupter (GFCI); this device is intended

for the protection of personnel

When installing electrical metallic tubing (EMT), there shall be NO more than __________ 90 degree bends in the tubing between boxes and/or pull points

four 358.26

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

its temperature rating

insulated conductors and cables installed in underground installations shall be

listed for use in wet locations 310.10(C)(3)

When a 20-ampere, 125-volt receptacle outlet is installed, in which of the following listed locations is the receptacle required to have GFCI protection?

under an outdoor canopy, near the entrance of a public library 210.8(B)(4)

Electrical wiring installed ___________________ is considered to be installed in a damp location

under canopies or roofed open porches