In article , "Asimov" wrote:
"Fred Bloggs" bravely wrote to "All" (11 Nov 05 00:24:42)
--- on the heady topic of " Commercial mains wiring: 12ga wire for 30 amp =
load?"

FB From: Fred Bloggs
FB Xref: core-easynews sci.electronics.design:522117
FB sci.electronics.misc:132449 sci.electronics.repair:348125
FB alt.engineering.electrical:142556

FB GregS wrote:
It does not have to be matched. Only on how big the breaker can be.
The wire can be bigger than the breakers rating.

FB Nonsense- if you hook say 40A 6ga to a 20A breaker, that 40A will trip
FB the breaker almost immediately...


And perhaps permanently...

A*s*i*m*o*v

.... A fail-safe circuit will destroy others.


Let me try another approach. If you attach a 10 guage wire to a 20 amp breaker, a 10 amp load will
opperate more effeciently and have more voltage, and the wire will run cooler. The ground will also
have a better connection to the main box.

greg