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Old March 1st, 2006, 02:24 PM   #8
DickDV
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United States

DickDV is offline
 
Join Date: May 2002
Location: Kalamazoo MI
Posts: 2,310
I'm not an electric code expert but I can assure you that if you have a 15hp motor running on a 30hp drive (this is not so unusually on heavy overload applications), and you size the branch circuit protection for the 15hp motor instead of the 30hp drive, you will not get past powering up the drive without the branch circuit protection releasing. That's due to the inrush current when first powering up the drive.

Maybe the drive instruction manuals are in conflict with the code but, if you don't follow the fusing requirements in the drive manual, you are headed for trouble.
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