I've got a setup where my 20 amp circuit breaker powers two garage receptacles, and I'm using 12/2 wire for the short run. Near the second receptacle, I've tapped off a short 14/2 line that goes to an outdoor light fixture, which also has a short run of about 35 feet from the breaker to the end of the circuit. Can anyone tell me if this setup is compliant with code? By the way, the house was built in the 50s, and the light is controlled with a dusk to dawn photocell, so there's no manual switch.
3 Answers
Nope, having a 20 amp breaker means all the wiring should be 12 gauge. If you switched to a 15 amp breaker, that would be fine, but as it stands, it's not okay.
Just to clarify, the breaker size really does dictate the wire gauge since it protects against overheating. Using 14 gauge wire means you’re limited to a max of 15 amps according to code.
This setup isn't up to code. While your breaker allows for 20 amps, 14/2 wire is rated for a maximum of 15 amps, putting you at risk for overheating and potential fire hazards. Swapping out that 20 amp breaker for a 15 amp would be a straightforward fix.
Totally agree! If something happens up at the light or you add more loads to the circuit in the future, that 14/2 could definitely pose a fire risk with an oversized breaker.
And please leave a note inside the panel if you change the breaker. Future homeowners might see the 12/2 and think it’s okay to have a 20 amp breaker, not knowing about the 14/2 downstream. It could prevent a serious hazard.