NFPA 70 Questions and Answers |
Latest Version | 2025/2026 | Correct &
Verified
What is the primary purpose of NFPA 70?
✔✔To establish safe installation and use of electrical wiring and equipment.
What is the minimum clearance for working space in front of an electrical panel?
✔✔3 feet.
What is the required grounding conductor for a 120/240V residential service?
✔✔A copper or aluminum conductor sized according to NEC Table 250.122.
What is the maximum allowable voltage drop for feeder and branch circuits combined?
✔✔5%.
What type of wiring method is allowed for branch circuits in a residential dwelling?
✔✔Nonmetallic-sheathed cable (NM, Romex).
1
, What is the purpose of a GFCI outlet?
✔✔To protect people from electric shock by detecting ground faults.
Where are GFCI outlets required in a residence?
✔✔Bathrooms, kitchens, garages, outdoors, and near sinks.
What is the maximum distance between outlets in a living room according to NEC?
✔✔12 feet.
What color is used for the grounding conductor in most residential wiring?
✔✔Green or bare copper.
What is the maximum overcurrent protection for a 14 AWG copper branch circuit?
✔✔15 amps.
What is the minimum height for a wall-mounted receptacle in a dwelling?
✔✔15 inches above the floor.
2
Latest Version | 2025/2026 | Correct &
Verified
What is the primary purpose of NFPA 70?
✔✔To establish safe installation and use of electrical wiring and equipment.
What is the minimum clearance for working space in front of an electrical panel?
✔✔3 feet.
What is the required grounding conductor for a 120/240V residential service?
✔✔A copper or aluminum conductor sized according to NEC Table 250.122.
What is the maximum allowable voltage drop for feeder and branch circuits combined?
✔✔5%.
What type of wiring method is allowed for branch circuits in a residential dwelling?
✔✔Nonmetallic-sheathed cable (NM, Romex).
1
, What is the purpose of a GFCI outlet?
✔✔To protect people from electric shock by detecting ground faults.
Where are GFCI outlets required in a residence?
✔✔Bathrooms, kitchens, garages, outdoors, and near sinks.
What is the maximum distance between outlets in a living room according to NEC?
✔✔12 feet.
What color is used for the grounding conductor in most residential wiring?
✔✔Green or bare copper.
What is the maximum overcurrent protection for a 14 AWG copper branch circuit?
✔✔15 amps.
What is the minimum height for a wall-mounted receptacle in a dwelling?
✔✔15 inches above the floor.
2
