"Em" wrote in message
...
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

So, when one of the wirenuts starts getting loose and causes an 19A circuit,
you feel safe knowing that the 20A breaker won't trip, but the 14awg wiring
isn't rating for 19A?