Because you must always add 25% to the load calc for the "largest motor", if it is the branch circuit that feeds only that motor or if it is the whole house, that 25% always gets added. But only one time for the 1 larges motor covered by whatever service/feeder/branch is under consideration.
I suspect it is for better motor starting, not a continuous load thing.
Hi Can anyone clarify for me when do I have to add the +%25 for the largest motor in single and multifamily load calculations? I have read about it and saw many examples online but sometimes I saw that it should be calculated as name plate and sometimes +%25. Thank you please see bellow When...
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