NEC Wiring Methods and Materials 3

Question 1

What is the maximum total degrees of bends permitted in a run of EMT between pull points?

Accepted Answer

360 degrees

Answer

NEC 358.26 limits bends between pull points to the equivalent of four quarter bends, or 360 degrees total.

Question 2

EMT must be securely fastened within what distance of each outlet box, junction box, or conduit termination?

Accepted Answer

3 feet

Answer

NEC 358.30(A) requires EMT to be fastened within 3 ft of each box or termination and at least every 10 ft.

Question 3

Type NM cable run along framing members must be secured within what distance of every cable entry into an enclosure that has cable clamps?

Accepted Answer

12 inches

Answer

NEC 334.30 requires NM cable to be secured within 12 in of each box or fitting and at intervals not exceeding 4.5 ft.

Question 4

When NM cable enters a single-gang nonmetallic box that has no cable clamps, within what distance of the box must the cable be secured?

Accepted Answer

8 inches

Answer

Article 314 allows a single-gang nonmetallic box without clamps only when the cable is secured within 8 in of the box.

Question 5

Per Table 300.5, what is the minimum cover for Type UF cable buried directly in the earth with no other protection, under general conditions?

Accepted Answer

24 inches

Answer

Column 1 of Table 300.5 requires 24 in of cover for direct-buried cables or conductors.

NEC Practice Test