I'm somewhat confused(easily),can I safely use a 30 amp breaker if I wire the ground to the proper ground strip in the panel,even if my receptacles are 20 amp?
06-06-13: Lacee
NO, not per NEC code or your local AHJ.
Why would you want to? The current carrying guts inside a 20 amp breaker are the same as a 30 amp breaker. The difference between the two breakers is the thermal and magnetic trip mechanism.
A 20 amp Square D QO breaker will pass a one cycle inrush current of about 120 amps before it trips open.
A 30 amp QO will pass an inrush current of close to 300 amps for about 8 to 10 cycles before it trips open.
A 20 amp breaker will handle any dynamic peak current pulses from your power amp without any problem.
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