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

NEC Article 330

Answer

NEC Article 334

Answer

NEC Article 340

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

0 inches

Answer

12 inches

Answer

24 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

Terminate in a NEMA 4 enclosure at the point of entry

Answer

Use only RMC for the final 5 feet before building entry

Answer

Be equipped with a drain fitting at the lowest point of the conduit run

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

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

Answer

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

Answer

10 times the trade diameter of the largest conduit 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

180 degrees

Answer

270 degrees

Answer

450 degrees

Question 6

According to NEC 334.12, Type NM cable is prohibited from being installed in which of the following locations?

Accepted Answer

Embedded in poured concrete or masonry

Answer

Interior walls of single-family dwellings

Answer

Attic spaces above insulation

Answer

Accessible crawl spaces of one-family homes

Question 7

NEC 300.3(B) requires that all conductors of the same circuit — including the grounded conductor and equipment grounding conductor — must be:

Accepted Answer

Contained within the same raceway, cable, or run together as a group

Answer

Installed in separate raceways to minimize heat buildup

Answer

The same AWG size throughout the entire circuit

Answer

Color-coded using only black, white, and green throughout