Quote:
Originally Posted by Al Skierkiewicz
Not to confuse you even more, the rules on the breaker size relates to the wire each breaker is feeding. The breaker is a safety to prevent the wires from burning up not to protect the motors. CIM motors will still draw 129 amps at stall no matter the size of the breaker you install.
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It may also be helpful for rookies to know that these breakers are thermally sensitive. They
will allow current draws in excess of their rating before over heating and tripping. The higher the current draw the faster they will trip, but there is still a finite reaction time. The point is, they are only there to
protect the wiring, which can handle brief current excesses, not components, which sometimes can't survive that. Fisher-Price motors have a wonderful ability to fry before the breakers will trip.
When they do reset they are now still quite hot, and will be more apt to trip. After a couple of trips they can be considered de-rated, and should be replaced.