OCPD after derating

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euclid43

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after derating my conductors because routing 22 conductors inside conduit, I am now faced with the problem of terminating these new (bigger) wires into OCPD. For instance, the OCPD use to have a #12, now it has to fit a #6 perhaps.
 
Ok .... that doesn't accomodate a #6? I was thinking of crimping a stake-on and then that would work, no?
 
euclid43 said:
Ok .... that doesn't accomodate a #6? I was thinking of crimping a stake-on and then that would work, no?
Click to expand...

What brand panel/CB are you using?

What's a sta-con rated for?
Would using them in this application violate 110.3(B)?


By the time you are done looking that up, the panel will be terminated with whatever wire is laying around [from #12 - #8] and some wirenuts.
 
Are you saying that I should fit a foot long #8 into CB, and wirenut a #6 to it and later attach to a #12? Why derate if the only wiring difference is in the middle?
 
The derating is needed for the portion of the run that has (20) conductors inside of a conduit, where the heat builds up. Once the conductor is in the panel gutter, the heat load dissapates, and does not use the OCPD as a heat sink, making the OCPD trip at inaccurate load points. The same is true at the other (load) end, depending on what kind of device is being fed. I doubt you're running (20) #6's into a wall box, and you can splice/downsize the conductors in downstream portions of the run, to #8, #10, #12, whatever is required for the ampacity derating for that portion of the circuit.

This makes sense for ampacity derating--voltage drop is a different consideration.
 
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