CEI Branch Circuit & Feeder Inspection 3

Question 1

Per the NEC informational note to 210.19(A)(1), the maximum recommended voltage drop for a branch circuit alone is:

Accepted Answer

3%

Answer

NEC 210.19(A)(1) Informational Note No. 4 recommends that the voltage drop on any branch circuit not exceed 3% for efficiency and equipment performance.

Question 2

Per NEC 210.4(B), a multi-wire branch circuit must have a means to simultaneously disconnect all ungrounded conductors at:

Accepted Answer

The panelboard where the branch circuit originates

Answer

NEC 210.4(B) requires simultaneous disconnection of all ungrounded conductors of a multi-wire branch circuit at the panelboard of origin, typically using a 2-pole or 3-pole breaker.

Question 3

GFCI protection for all 125-volt, 15- and 20-ampere receptacles in bathrooms of dwelling units is required by NEC:

Accepted Answer

210.8(A)(1)

Answer

NEC 210.8(A)(1) specifically requires GFCI protection for receptacle outlets installed in bathrooms of dwelling units.

Question 4

What is the minimum individual branch circuit rating required for a household electric clothes dryer per NEC 220.54?

Accepted Answer

30-ampere, 240-volt

Answer

NEC 220.54 requires household electric dryers to be calculated at 5,000 watts or the nameplate rating (whichever is larger), and standard dryers require a 30-ampere, 240-volt branch circuit.

Question 5

The 'high leg' conductor in a 3-phase, 4-wire delta system, which has a higher voltage to ground than the other conductors, must be identified by which color per NEC 110.15?

Accepted Answer

Orange

Answer

NEC 110.15 requires the conductor with the higher phase voltage to ground in a 4-wire delta system to be permanently and durably identified with orange color.

(CEI) Certified Electrical Inspector Practice Test

(CEI) Certified Electrical Inspector Practice Test

CEI Branch Circuit & Feeder Inspection 3