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What does the Form M10 designate for a NEMA starter or contactor?

M10 indicates Marine Control. This is a modification of a standard NEMA 4 or 12 device for use as Marine control per UL508 Marine supplement SA (Industrial Control Equipment for Marine use (February 23, 1993) and CFR46 (Subchapter J - Electrical Engineering 10-1-93 edition.)


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