Code Q&A: Calculating Feeder or Service Loads

NEC requirements for calculating feeder or service loads

Q. How can you determine the feeder or service load for an existing installation? (Answer based on 2011 NEC.)

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A. The calculation of a feeder or service load for existing installations can be based on the actual maximum demand under all of the following conditions [220.87]:

1)  The maximum demand data for one year [220.87].

Exception: If the maximum demand data

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