Feeder & Breaker Sizing of Process Equipment

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Robert Maddox

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Where or what code articles refer to the proper size breaker & feeder to power process equipment? The equipment is a manufactured assembly that will be delivered to the job site & assembled. I would presume it would have some form of a ?name-plate? this gives the Voltage, Phase & Power Requirements. (Similar to an outdoor AC unit nameplate).

However we have been told that it does not have a ?nameplate? (this is used equipment) and that they just used an amp-meter to measure the draw while it was running. Is this acceptable per NEC? What NEC articles would govern this issue?

Thanks for your input.
 
Can you contact the company that manufactured the package and get there input as to wire size amps, max breaker and/or fuse?

MOTORS-NEC 430
AC AND REF-NEC 440

These articles may apply to good portion of the requirements but these articles may refer to other code articles as well.

Good luck.
 
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Robert Maddox said:
Where or what code articles refer to the proper size breaker & feeder to power process equipment? The equipment is a manufactured assembly that will be delivered to the job site & assembled. I would presume it would have some form of a ?name-plate? this gives the Voltage, Phase & Power Requirements. (Similar to an outdoor AC unit nameplate).

However we have been told that it does not have a ?nameplate? (this is used equipment) and that they just used an amp-meter to measure the draw while it was running. Is this acceptable per NEC? What NEC articles would govern this issue?

Thanks for your input.
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I'd be more inclined to look at the individual loads and do what amounts to a load calculation. There is no way to know how the equipment was used previously so the amp readings are not especially meaningful.

IMO there ought to be some kind of indication of the FLA somewhere on the equipment, the drawings, the manuals, etc.
 
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