Journeyman Electrician’s Exam Journeyman Electrician's Boxes and Enclosures 2

Question 1

According to NEC 314.28(A)(1), what is the minimum box length required for a straight pull when the largest raceway entering the box is 3-inch trade size?

Accepted Answer

24 inches

Answer

18 inches

Answer

30 inches

Answer

36 inches

Question 2

Per NEC 314.28(A)(2), what multiplier is used to calculate the minimum box dimension for angle pulls or U-pulls?

Accepted Answer

6 times the largest raceway plus sum of remaining raceways

Answer

4 times the largest raceway plus sum of remaining raceways

Answer

8 times the largest raceway plus sum of remaining raceways

Answer

10 times the largest raceway plus sum of remaining raceways

Question 3

NEC 314.28 pull box sizing requirements apply when conductors are at least what size?

Accepted Answer

4 AWG or larger

Answer

6 AWG or larger

Answer

2 AWG or larger

Answer

1/0 AWG or larger

Question 4

NEC 314.29 requires that junction boxes and pull boxes be:

Accepted Answer

Accessible without removing any part of the building structure or finish

Answer

Installed only in accessible attics or crawl spaces

Answer

Labeled with the voltage and ampacity of contained conductors

Answer

Located within 6 feet of the equipment they serve

Question 5

Per NEC 314.16(C)(2), a conduit body used for splicing must:

Accepted Answer

Have its volume marked and meet the conductor fill requirements of 314.16(B)

Answer

Never contain splices under any circumstances

Answer

Be at least 4 inches in trade size to permit splicing

Answer

Be listed as a junction box rather than a conduit body

Question 6

A pull box has a 2-inch conduit and a 3-inch conduit entering the same wall for an angle pull. What is the minimum required dimension of that wall?

Accepted Answer

20 inches (6 × 3 + 2)

Answer

18 inches (6 × 3)

Answer

24 inches (8 × 3)

Answer

30 inches (8 × 3 + 6)

Question 7

According to NEC 314.28(A)(1), if a straight pull box has a 4-inch trade size conduit entering it, what is the minimum required box length?

Accepted Answer

32 inches

Answer

24 inches

Answer

36 inches

Answer

48 inches