In a message dated 10/13/2005 7:44:04 PM Eastern Daylight Time,
amps080605@w4zt.com writes:
Dave,
Below you said you were running 4 breakers, each 30 amps. Then you said
two of those breakers would be wired with #12 wire. If your breaker is
going to be a 30 amp breaker, you must, for safety's sake and to meet
NEC, use at least #10 wire. You should NEVER use wire rated less than
the capacity of the breaker. If you are using #12 wire, the breaker
should never be larger than 20 amps. The length of the run is of no
consideration when it comes to meeting the minimum requirement of the
code.
This is NOT entirely true. If you are running motor circuits you may up the
rating of the circuit breaker well over the size wire that is being used.
However, for branch circuits the above is true, but as I have stated, NOT
always.
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