NEC Wiring Methods & Materials 3

Question 1

Type MC cable installed in a wet location must be which of the following?

Accepted Answer

Listed and identified for use in wet locations

Answer

NEC 330.10(A)(11) requires Type MC cable used in wet locations to be listed and identified for use in wet locations.

Question 2

What is the minimum size equipment grounding conductor required for a circuit protected by a 100A overcurrent device?

Accepted Answer

8 AWG copper

Answer

NEC Table 250.122 requires a minimum 8 AWG copper equipment grounding conductor for circuits with 100A overcurrent protection.

Question 3

Nonmetallic-sheathed cable (NM) is NOT permitted to be installed in which of the following?

Accepted Answer

Buildings exceeding three floors above grade

Answer

NEC 334.10 restricts Type NM cable use and prohibits it in buildings exceeding three floors above grade.

Question 4

When RMC passes through a concrete floor slab, which of the following is required at the termination above the slab?

Accepted Answer

A bushing or equivalent protection

Answer

NEC 344.46 requires a bushing or equivalent protection at the end of RMC where it emerges from a floor slab to protect conductors from abrasion.

Question 5

What is the maximum length of a flexible metal conduit (FMC) connection at a luminaire in a ceiling assembly?

Accepted Answer

6 feet

Answer

NEC 348.20(A) permits FMC in lengths not exceeding 6 feet for connection of luminaires within a ceiling assembly.

NEC Practice Test