FREE TN LLE Conductors and Cables Questions and Answers

Question 1

An electrician installs five current-carrying THHN copper conductors in a single raceway in an area with an ambient temperature of 98°F.
If each conductor is 8 AWG, what is its final allowable ampacity after applying all necessary correction factors?

Accepted Answer

36.96 A

Answer

55 A

Answer

44 A

Answer

38.72 A

Question 2

According to NEC Article 310, which of the following conductor types is suitable for use in a wet location?

Accepted Answer

THWN-2

Answer

THHN

Answer

FFH-2

Answer

TFFN

Question 3

An electrician is connecting a 10 AWG solid copper conductor to a standard screw terminal on a receptacle. Which of the following installation practices is required by the NEC?

Accepted Answer

The conductor must be wrapped in a clockwise direction around the screw.

Answer

The conductor must be wrapped at least 3/4 of the way around the screw.

Answer

The conductor must be tinned with solder before being placed under the screw.

Answer

The conductor must be formed into a loop with an opening smaller than the screw head.

Question 4

When conductors are installed in parallel, which of the following is NOT an NEC requirement for each of the parallel conductors within a set?

Accepted Answer

They must have the same color insulation.

Answer

They must be the same length.

Answer

They must be made of the same material (e.g., all copper).

Answer

They must have the same circular mil area.

Question 5

What is the minimum size copper conductor permitted for general purpose branch circuits in residential, commercial, and industrial locations?

Accepted Answer

14 AWG

Answer

16 AWG

Answer

12 AWG

Answer

18 AWG

Question 6

An electrician is upsizing 3/0 AWG copper conductors to 350 kcmil to account for voltage drop on a long feeder protected by a 200-amp breaker. What is the minimum size copper equipment grounding conductor (EGC) that must be installed?

Accepted Answer

3 AWG

Answer

4 AWG

Answer

6 AWG

Answer

2 AWG

An electrician installs five current-carrying THHN copper conductors in a single raceway in an area with an ambient temperature of 98°F.If each conductor is 8 AWG, what is its final allowable ampacity after applying all necessary correction factors?

An electrician installs five current-carrying THHN copper conductors in a single raceway in an area with an ambient temperature of 98°F.
If each conductor is 8 AWG, what is its final allowable ampacity after applying all necessary correction factors?