NEC Safety Procedures & Code Compliance 3 — Questions and Answers
Question 1: Per NEC 210.8(A), GFCI protection is required for 125V receptacles in which residential location?
- Bedrooms
- Bathrooms (Correct answer)
- Hallways
- Living rooms
Correct answer: Bathrooms
NEC 210.8(A) lists bathrooms among locations requiring GFCI protection.
Question 2: What device protects against arcing faults that can cause fires, required in dwelling bedrooms?
- GFCI
- AFCI (Correct answer)
- Surge protector
- Isolation transformer
Correct answer: AFCI
AFCI (Arc-Fault Circuit Interrupter) detects dangerous arcing and is required in bedrooms per NEC 210.12.
Question 3: What is the maximum overcurrent protection for a 12 AWG copper conductor under normal conditions?
- 15 amps
- 20 amps (Correct answer)
- 25 amps
- 30 amps
Correct answer: 20 amps
NEC 240.4(D) limits 12 AWG copper to 20 amps overcurrent protection.
Question 4: Per NEC, what color is reserved for the equipment grounding conductor?
- White
- Green or green with yellow stripe (Correct answer)
- Blue
- Gray
Correct answer: Green or green with yellow stripe
NEC 250.119 identifies equipment grounding conductors as green or green with a yellow stripe.
Question 5: What is required where a panelboard is installed, regarding the directory?
- Left blank for the homeowner
- Legibly identify the purpose of each circuit (Correct answer)
- Only label the main breaker
- Identify only 240V circuits
Correct answer: Legibly identify the purpose of each circuit
NEC 408.4 requires each circuit to be legibly identified as to its purpose.
Question 6: When using a portable ladder near energized electrical equipment, which material is safest?
- Aluminum
- Fiberglass (Correct answer)
- Steel
- Copper-reinforced
Correct answer: Fiberglass
Fiberglass ladders are non-conductive, making them safest near energized equipment.
Question 7: What is the minimum burial depth for direct-buried UF cable rated 0-600V under a residential driveway per NEC Table 300.5?
- 6 inches
- 12 inches
- 18 inches (Correct answer)
- 24 inches
Correct answer: 18 inches
NEC Table 300.5 requires 18 inches of cover for direct-buried cable in most residential conditions.
NEC Safety Procedures & Code Compliance 3
Per NEC 210.8(A), GFCI protection is required for 125V receptacles in which residential location?