Quote:
Originally Posted by protoserge
No. It is not.
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I will admit that that was a sweeping statement I made about the circuit layouts, sorry about that. You will often see smaller breakers in the panel than the wire can handle, before we had our former classroom turned shop rewired it had a LOT of 10A breakers when the wire gauge could have handled 15A.
If you have a 10A breaker, there are no problems on the part of the 14g wire upgrading it to a 15A breaker. A 2 HP(1500 Watts) Bridgeport at peak amperage being run via a VFD is 12.5A @120V even with efficiency losses you would have to be pushing that mill very hard to hit 15A (1800 Watts).
12g can be bumped to 20A (2400 Watts)
10g can be bumped to 30A (3600 Watts)