PC Electrical Codes & Standards 3 — Questions and Answers
Question 1: According to NEC 240.4, what is the standard overcurrent protection for 14 AWG copper conductors?
- 10 amperes
- 15 amperes (Correct answer)
- 20 amperes
- 25 amperes
Correct answer: 15 amperes
NEC 240.4(D)(3) limits overcurrent protection for 14 AWG copper wire to a maximum of 15 amperes.
Question 2: What does NEC Article 680 cover?
- Hazardous locations
- Swimming pools and similar installations (Correct answer)
- Solar photovoltaic systems
- Emergency systems
Correct answer: Swimming pools and similar installations
NEC Article 680 covers the installation of electrical wiring and equipment for swimming pools, fountains, and similar water features.
Question 3: Under NEC 210.8, GFCI protection is required for receptacles in which residential location?
- Bedrooms
- Living rooms
- Bathrooms (Correct answer)
- Hallways
Correct answer: Bathrooms
NEC 210.8(A) requires GFCI protection for all receptacles in bathrooms of dwelling units.
Question 4: What is the minimum wire bending space required at the terminals of a 200A panelboard per NEC 312.6?
- 2 inches
- 3.5 inches
- 4 inches (Correct answer)
- 5 inches
Correct answer: 4 inches
NEC Table 312.6(A) requires a minimum of 4 inches of bending space for conductors sized 3/0 AWG and smaller at 200A terminals.
Question 5: Which NEC article covers wiring methods and materials for raceways, cables, and enclosures?
- Article 300 (Correct answer)
- Article 310
- Article 320
- Article 330
Correct answer: Article 300
NEC Article 300 provides general requirements for wiring methods and materials applicable to all wiring installations.
Question 6: Per NEC 230.24, what is the minimum clearance for service drop conductors above a residential roof with a slope of 4/12 or greater?
- 8 feet
- 3 feet (Correct answer)
- 10 feet
- 18 feet
Correct answer: 3 feet
NEC 230.24(A) Exception No. 2 allows a minimum 3-foot clearance above a roof with a slope of not less than 4 inches in 12 inches.
Question 7: What organization publishes the National Electrical Code (NEC)?
- IEEE
- OSHA
- NFPA (Correct answer)
- ANSI
Correct answer: NFPA
The National Electrical Code is published by the National Fire Protection Association (NFPA) as NFPA 70.
PC Electrical Codes & Standards 3
According to NEC 240.4, what is the standard overcurrent protection for 14 AWG copper conductors?