Originally Posted by driftinby
I've done the same- ran a\c and some lights on a 15 amp circuit without a problem. By design, a 20 or 15 amp breaker will break long before a 30-amp cord heats up.
I do agree, that by design the circuit breaker will hopefully trip...but this is not always in reality. Depending on my mood, I sometimes just go with the flow and state the same, or sometimes get all 'preachy".......like now.
Everyone "hopes" the circuit breaker will trip if overloaded, but this isn't always the case. I have stated in several of my soap box rants, to please don't place blind faith in a circuit breaker. They go bad, and some are built bad....and they fail many times.
Experts say electrical panels may be a fire waiting to happen | Dallas Morning News
Here is some more reading for everyone to understand what a circuit breaker is actually designed for. You may be surprised:
This is speaking from someone who had a small electrical panel fire at my shop several years ago. The panel just happens to be in my office, about ten feet away and I started smelling something burning and it caught fire. If I hadn't been in here, the whole shop may have went up in flames.
That's why I go off on these tangents every now and again