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The regulations specifically allow omission of fault protection where the circuit is not expected to be able to carry overload current so you can have a situation where say a fixed load is 46 amps the ccc of the cable is 48 amps but your ocpd is 50 amps provided fault protection is afforded as required by section 434Matters not. I am not saying up the breaker.....but if you do up it, the cable should also be upped accordingly for cable protection. That protection is needed, even though you are not varying the load. Just regulation, that's all.
The formula for the tabulated current becomes Ib/correction factors rather than In/
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