15amp

15 amp refers to the electrical current rating of a standard branch circuit in many North American homes. A 15A circuit is designed to carry up to 15 amperes of current at a nominal voltage of 120 volts, giving a maximum theoretical power of 1,800 watts.

The circuit is protected by a 15-amp circuit breaker or fuse. Wiring on a 15A circuit is typically 14 gauge copper, though larger conductors can be used. The combination of conductor size and protection ensures that the circuit will trip or blow if the current exceeds its rating to prevent overheating.

Typical uses for a 15A circuit include general lighting and receptacles that serve everyday appliances and electronics. On continuous loads (loads expected to run for three hours or more), the recommended limit is 80% of the circuit rating, i.e., about 12A (roughly 1,440 watts at 120V). Heavier appliances such as space heaters, large microwaves, or air conditioners may require a dedicated circuit or a higher-capacity circuit, such as 20A.

15A circuits differ from 20A circuits primarily in maximum current capacity and required wiring. A 20A circuit may use 12 AWG copper and can accommodate certain 20A-rated receptacles, while 15A receptacles are compatible on many 20A circuits.

Safety and code considerations include grounding of outlets, use of GFCI protection in kitchens and bathrooms, and AFCI protection in living spaces. Proper load management and adherence to local electrical codes help prevent overheating and electrical fires.