FREE TN-LLE Raceway and Box Fill Questions and Answers

Question 1

What is the maximum number of 12 AWG THHN conductors permitted in a 4" x 4" x 1-1/2" square metal box?

Accepted Answer

9

Answer

7

Answer

8

Answer

10

Question 2

A metal device box contains one duplex receptacle, four 14 AWG current-carrying conductors, and one 14 AWG grounding conductor. What is the total volume allowance required for these components?

Accepted Answer

14.0 cu. in.

Answer

12.0 cu. in.

Answer

16.0 cu. in.

Answer

10.0 cu. in.

Question 3

What is the maximum number of 10 AWG THHN conductors permitted in a 3/4" Electrical Metallic Tubing (EMT)?

Accepted Answer

16

Answer

10

Answer

12

Answer

14

Question 4

What is the minimum trade size of Schedule 40 PVC conduit required to enclose three 6 AWG THWN conductors and two 8 AWG THWN conductors?

Accepted Answer

1"

Answer

3/4"

Answer

1-1/4"

Answer

1-1/2"

Question 5

A junction box has straight pulls of 3" Rigid Metal Conduit (RMC) entering and leaving. What is the minimum required length of the box?

Accepted Answer

24 inches

Answer

18 inches

Answer

30 inches

Answer

36 inches

Question 6

A pull box has two 2" conduits entering one side and one 3" conduit leaving the opposite side for a straight pull. What is the minimum length of the box?

Accepted Answer

24 inches

Answer

16 inches

Answer

21 inches

Answer

32 inches