CEI Branch Circuit & Feeder Inspection

Question 1

Which NEC article specifically covers the installation requirements for branch circuits in dwelling units and commercial buildings?

Accepted Answer

Article 210

Answer

NEC Article 210 covers branch circuits, including ratings, required circuits, and outlet placement requirements.

Question 2

What is the maximum load permitted on a 20-ampere branch circuit that supplies continuous loads, per the 80% rule?

Accepted Answer

16 amperes

Answer

Per NEC 210.19(A)(1), continuous loads must not exceed 80% of the branch circuit rating, so 20A × 80% = 16A maximum.

Question 3

Per NEC 210.11(C)(1), how many small appliance branch circuits are required to serve the kitchen receptacle outlets in a dwelling unit?

Accepted Answer

Two 20-ampere circuits

Answer

NEC 210.11(C)(1) requires at least two 20-ampere small appliance branch circuits to serve kitchen, dining room, and similar areas.

Question 4

What is the minimum conductor size (AWG copper) permitted for a 20-ampere branch circuit?

Accepted Answer

12 AWG

Answer

Per NEC 210.19(A) and Table 310.16, 12 AWG copper is the minimum conductor size rated for use on 20-ampere branch circuits.

Question 5

Per NEC Article 100, an individual branch circuit is defined as one that:

Accepted Answer

Supplies only one piece of utilization equipment

Answer

An individual branch circuit, as defined in NEC Article 100, is a branch circuit that supplies only one piece of utilization equipment.

(CEI) Certified Electrical Inspector Practice Test