Question
Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?
Answer Options
- A) 30 amperes
- B) 25 amperes
- C) 20 amperes
- D) 15 amperes
Correct Answer: D
Explanation
Based on the standards set by the National Electrical Code (NEC) Article 310, every wire gauge has a maximum ampacity (current carrying capacity) that must be protected by an appropriately sized circuit breaker or fuse. This ensures that the protection device trips before the wire overheats.
AWG number 14 wiring has a maximum current rating of 15 amperes for residential wiring applications. Therefore, the largest size of fuse or circuit breaker that can safely be used with AWG number 14 wiring is 15 amperes.
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