General Wiring Questions On A 240v 50amp Line

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Where did you get this chart? I thought the 80% rule is for sizing circuit breakers and is independent of the cable to be used. I've also been led to believe it's fine to run 55A through a cable that's rated for 55A. Please let me know if that's wrong.

Continuous loads (expected to operate continuoulsy for 3 hours or more) are subject to conductor derating (80% rule).

Non-continuous loads which I think applies to most of our electrical builds can be sized for 100% of the conductor capacity.
 
Continuous loads (expected to operate continuoulsy for 3 hours or more) are subject to conductor derating (80% rule).

Non-continuous loads which I think applies to most of our electrical builds can be sized for 100% of the conductor capacity.

I appreciate the clarification. :mug:
 
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