circuit breaker selection Maybe OT

Oct 12, 2003 4 Replies

This may be a bit off topic, however, I have just wired in an electric heater for my shop. The heater is a 208/240V @ 19.6 amps. The breaker that supplies my shop (detached) is a double pole 10A 10AWG 3+ground. Question is: If the main breaker from the panel is 10A, is that per voltage lead, or overall. If the heater requires almost 20A, then do I want a 220 single pole (double 20A with trip cap on top) or double 10A.



Any help appreciated



Brian


Size the breaker to protect the wire - 10AWG = 25-30A. The breaker should be a double slot (pole) 25 or 30A.

ELAhrens Apprentice Termite

I have changed the breaker in the home box to 30A. For a test, I turned the heater on, all the lights, and ceiling fan, along with the table saw and miter saw. All went fine, without a hitch.

Thanks to all,

Brian

Bob Walters wrote:

isn't 80% of 20 16?

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