NFPA 79 or NEC 1

[JII]

This is an easy one - I am trying to get a full understanding of the requirements for power connected to an industrial 3 phase machine based on the machine data plate. I know that the data plate rated amperage is the sum of all of the motors at full load, but I also know that all of the motors cannot be run simultaneously. If my data plate says 100 Amps at 460V, but at no time do I ever get above 40 Amps during operation of the machine, am I still required to have a 100 Amp service supplied to the machine? Thanks in advance.

 

[RonShap]

Does the nameplate say something like MCA (minimum circuit amps)? If it does, then you must have conductors at least as large as the MCA rating. The NEC requires you to follow the manufacturers nameplate, hence the UL listed configuration.