What Size Wire Do I Need For A 15 Amp Circuit?
What Size Wire Do I Need For A 15 Amp Circuit? A 15-amp circuit is usually served by 14-gauge wire and is protected by a 15-amp circuit breaker or fuse. A 20-amp circuit, protected by a 20-amp breaker or fuse, must be served by 12-gauge or 10-gauge wire. Is it OK to use 12 gauge