Feeder Calculation

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MR. S said:
When calculating a feeder for a commercial bldg., is a water heater, 120 gallons or less to be considered a continouis load?
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I will say for the purpose of feeder calculations no, but yes, for branch circuit calcs

422.13 Storage-Type Water Heaters.
A fixed storage-type water heater that has a capacity of 450 L (120 gal) or less shall be considered a continuous load for the purposes of sizing branch circuits.
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