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#86754 - 12/02/03 05:57 PM arc welder OCP
Tim Peters Offline

Registered: 03/08/03
Posts: 10
I'm installing a dedicated circuit for a portable arc welder. The min. rating is 15 amps at 120 volts and the max is 20 amps at 120 volts. Article 630-12 state that the OCP shall not be more than 200% of the max. My question is, what would be optimal? Should I install a 20 amp OCPD based off the MAX on the nameplate of the welder or should I use the Maximum stated by the NEC?

This kind of confused me because the code states no minimum only a maximum.

2014 / 2011 NEC & Related Books and Study Guides
#86755 - 12/03/03 01:28 PM Re: arc welder OCP
electricman2 Offline

Registered: 11/09/03
Posts: 234
Loc: Thomasville, NC USA
I believe that if the nameplate specified a 20A max OCPD, thats what I would use.


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