Branch circuit definition, where it begins

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brother

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Had interesting conversation with a fellow electrician about branch circuit pertaining to equipment. Would the equipment that have a breaker inside it be the final branch circuit or is it the last group of conductors that feed this equipment from disconnect??

I always looked at the branchcircuit as the final conductors ran from 'our building' to the equipment and not the actual equipment with its own breaker or fuses.
But when it comes to equipment that have multiple motors etc on it, what do you consider the 'final ocpd', since the disconnect will have the over loads in it before it reaches the equipment, and within the equipment itself i has the breakers and fuses as well.

I remember this comming up before on this forum, just remember how long ago.
 
That is an AHJ call, IMO but I also would say that the wire to the unit is the branch circuit that feeds the equipment. The breakers are part of the equipment and do not enter into the NEC definition. Add: so I guess it should not be an ahj call, IMO.
 
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brother said:
Had interesting conversation with a fellow electrician about branch circuit pertaining to equipment. Would the equipment that have a breaker inside it be the final branch circuit or is it the last group of conductors that feed this equipment from disconnect??

I always looked at the branchcircuit as the final conductors ran from 'our building' to the equipment and not the actual equipment with its own breaker or fuses.
But when it comes to equipment that have multiple motors etc on it, what do you consider the 'final ocpd', since the disconnect will have the over loads in it before it reaches the equipment, and within the equipment itself i has the breakers and fuses as well.

I remember this comming up before on this forum, just remember how long ago.
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See Definitions: Overcurrent Protective Device, Supplementary, and 240.10 Supplementary Overcurrent Protection.
 
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