TN LLE Wiring Methods and Installation

Question 1

According to NEC Table 300.5, what is the minimum burial depth for Type UF cable used for a 120/240V residential branch circuit?

Accepted Answer

12 inches

Answer

6 inches

Answer

18 inches

Answer

24 inches

Question 2

Under NEC 300.4(A)(1), where cables pass through bored holes in wood framing, the edge of the hole must be at least how far from the nearest edge of the wood member (or a steel protective plate must be installed)?

Accepted Answer

1-1/4 inches

Answer

1 inch

Answer

1-1/2 inches

Answer

2 inches

Question 3

According to NEC 334.30, Type NM cable must be secured within how many inches of every cabinet, box, or fitting it enters?

Accepted Answer

12 inches

Answer

6 inches

Answer

8 inches

Answer

18 inches

Question 4

According to NEC 334.30, what is the maximum interval for securing and supporting Type NM cable in exposed locations?

Accepted Answer

4.5 feet

Answer

2.5 feet

Answer

3 feet

Answer

6 feet

Question 5

Which of the following wiring methods is NOT permitted in wet locations?

Accepted Answer

Type NM cable

Answer

Rigid Metal Conduit (RMC)

Answer

Intermediate Metal Conduit (IMC)

Answer

Liquidtight Flexible Metal Conduit (LFMC)

Question 6

Under NEC 300.22(C), wiring installed in a plenum ceiling space used for air handling must:

Accepted Answer

Use only plenum-rated cables or wiring enclosed in metal conduit

Answer

Use any cable type since it is above the ceiling tile

Answer

Be installed only in armored cable (AC)

Answer

Be installed in rigid nonmetallic conduit

Question 7

What does NEC 300.15 require at each point where conductors are spliced or terminated?

Accepted Answer

A box, conduit body, or fitting must be installed at each splice or termination point

Answer

Conductors must be soldered at all splice points

Answer

Splices must only be made at the panelboard

Answer

Wire nuts are not permitted for permanent splices