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Steviechia2

Senior Member
Location
Massachusetts
Trying to figure overcurrent protection for branch circuit to a motor. If I have typical bolt on breaker which column do I use inverse breaker,instantaneous time breaker or other?
 
I don't think you will find instantaneous trip type breakers in a style that mounts in a panelboard, they will all be inverse time.

You may find inst. trip in motor control centers or combination starters, or industrial control panels.
 
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