Wiring Methods and Materials Flashcards
6 cards from real Journeyman Electrician’s Exam practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 Wiring Methods and Materials flashcards as text
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?
Answer: 8 times
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.
Per NEC Table 314.16(B), what is the cubic inch volume allowance for each 12 AWG conductor in a box fill calculation?
Answer: 2.25 cubic inches
NEC Table 314.16(B) assigns 2.25 cubic inches per 12 AWG conductor when calculating box fill.
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?
Answer: Two conductors equivalent
Each yoke or strap containing one or more devices counts as two conductor equivalents based on the largest wire connected to the device.
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?
Answer: 1-1/4 inches
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.
Per NEC 110.26(A)(2), what is the minimum headroom required in working spaces around electrical equipment operating at 600V or less?
Answer: 6.5 feet
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.
Per NEC 314.28(A)(2), for an angle pull in a pull box, the distance from each conduit entry to the opposite wall must be at least:
Answer: 6 times the trade size of the largest conduit, plus the sum of other conduits on the same wall
For angle pulls, NEC 314.28(A)(2) requires the distance from each entry to the opposite wall to be at least 6× the largest raceway plus the sum of trade sizes of other raceways on the same wall.