TN LLE Wiring Methods and Installation 2

Question 1

According to NEC 310.10(H), conductors connected in parallel must be what minimum size?

Accepted Answer

1/0 AWG or larger

Answer

NEC 310.10(H) permits conductors to be connected in parallel only if they are 1/0 AWG or larger.

Question 2

Per NEC Table 310.15(C)(1), when 4 to 6 current-carrying conductors are bundled together in a raceway, the ampacity must be derated to what percentage of the base table value?

Accepted Answer

80%

Answer

NEC Table 310.15(C)(1) requires an 80% derating factor when 4 to 6 current-carrying conductors are bundled in the same raceway.

Question 3

According to NEC 330.30, Type MC cable must be secured at intervals not exceeding:

Accepted Answer

6 feet

Answer

NEC 330.30 requires Type MC cable to be supported and secured at intervals not exceeding 6 feet.

Question 4

Under NEC 358.30, EMT (Electrical Metallic Tubing) must be secured at intervals not exceeding:

Accepted Answer

10 feet

Answer

NEC 358.30 requires EMT to be secured at least every 10 feet and within 3 feet of each outlet box, junction box, or other enclosure.

Question 5

Under NEC 350.60, Flexible Metal Conduit (FMC) is permitted to serve as the sole equipment grounding conductor only if the total ground return path length does not exceed:

Accepted Answer

6 feet

Answer

NEC 350.60 permits FMC to serve as the equipment grounding conductor if the ground return path length does not exceed 6 feet and the circuit overcurrent device does not exceed 20 amperes.

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE - Tennessee Limited Licensed Electrician Practice Test

TN LLE Wiring Methods and Installation 2