TN LLE Wiring Methods and Installation 3

Question 1

Type SE (Service Entrance) cable used for branch circuit or feeder wiring inside a building is governed by which NEC article?

Accepted Answer

NEC Article 338

Answer

Type SE cable — including its use for interior branch circuit and feeder wiring — is covered under NEC Article 338, Service Entrance Cable.

Question 2

According to NEC Table 300.5, what is the minimum direct burial depth for Rigid Metal Conduit (RMC) installed underground (not encased in concrete)?

Accepted Answer

6 inches

Answer

NEC Table 300.5 requires RMC installed as direct burial to have a minimum cover of 6 inches.

Question 3

Per NEC 300.5(G), conduits or raceways that enter a building from underground must:

Accepted Answer

Be sealed or plugged to prevent moisture or gases from entering the structure

Answer

NEC 300.5(G) requires underground conduits entering a building to be sealed or plugged to prevent moisture or gases from traveling through the conduit into the building.

Question 4

According to NEC 314.28(A)(1), the minimum dimension of a pull box used for straight pulls must be at least:

Accepted Answer

8 times the trade diameter of the largest conduit entering the box

Answer

NEC 314.28(A)(1) requires that for straight pulls the minimum box dimension must be at least 8 times the trade size of the largest raceway entering the box.

Question 5

Per NEC 358.26, what is the maximum total degrees of bends permitted in a single run of EMT between pull points?

Accepted Answer

360 degrees

Answer

NEC 358.26 limits bends in any EMT run between pull points to not more than 360 degrees total, equivalent to four 90-degree bends.

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE Wiring Methods and Installation 3