I added a light fixture to an existing 20A 12awg circuit, and didn't realize
I used 14awg romex until I was done. The new fixture wouldn't overload even
a 15A circuit, so a) are you gonna tell me I have to fix my error and put in
the larger cable, and b) why is that? Thanks
Is the 14awg cable switched, or not switched? If it's switched, I would
leave it alone (even though it is a technical code violation) because
nobody is gonna come along later and extend the circuit and install a
half dozen receptacles. If it is not switched, you have to be concerned
with what some idiot is going to add on to it 20 years from now.
14 gauge copper wire *is* rated for 20A, the code just says you have to
derate it to 15A anyway. Your 19A scenario wouldn't hurt anything.
I don't believe there is anything in the code to prevent you from changing
the breaker to protect the smallest conductor, but IMO, despite labels and
tags, it would seem to me all to easy for someone down the line to
inadvertently put a 12 gauge conductor back on a 20 amp breaker, not knowing
what you've done.
I would change the cable to the light.
somone 30 years from now could plug a power saw into a screw in
adapter and pull the full load 20 amps plus the breakers over currtent
24 amps on 14 gauge NOT GOOD AT ALL!
Yiour use may not be the next owners use:(
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.