Journeyman Electrician’s Exam Wiring Methods and Materials 3

Question 1

Per NEC 314.28(A)(1), for a straight pull through a pull box, the box length must be at least how many times the trade size of the largest raceway?

Accepted Answer

8 times

Answer

NEC 314.28(A)(1) requires the length of a pull box to be at least 8 times the trade size of the largest raceway for straight pulls.

Question 2

Per NEC Table 314.16(B), what is the cubic inch volume allowance for each 12 AWG conductor in a box fill calculation?

Accepted Answer

2.25 cubic inches

Answer

NEC Table 314.16(B) assigns 2.25 cubic inches per 12 AWG conductor when calculating box fill.

Question 3

Per NEC 314.16(B)(4), each device yoke or strap (such as a switch or receptacle) counts as how many conductors for box fill?

Accepted Answer

Two conductors equivalent

Answer

Each yoke or strap containing one or more devices counts as two conductor equivalents based on the largest wire connected to the device.

Question 4

Per NEC 300.4(A)(1), when boring holes through wood framing to route cables or conduit, the edge of the hole must be at least how far from the nearest edge of the framing member?

Accepted Answer

1-1/4 inches

Answer

NEC 300.4(A)(1) requires holes in wood framing to have at least 1-1/4 inches of wood remaining between the hole edge and the member's face.

Question 5

Per NEC 110.26(A)(2), what is the minimum headroom required in working spaces around electrical equipment operating at 600V or less?

Accepted Answer

6.5 feet

Answer

NEC 110.26(A)(2) mandates a minimum headroom of 6.5 feet (2.0 m) in working spaces about electrical equipment rated 600V or less.

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Practice Test

Journeyman Electrician’s Exam Wiring Methods and Materials 3