The overload relay in a very large majority of the motor starters opens the grounded conductor when the relay senses the motor is overloaded. None of these relays also open the ungrounded control circuit conductor.
Understood, You are so correct. For some reason I was thinking of the power circuit on the contactor and not the control circuit itself.
I have draws many a control circuits and should have known better. I drew control circuits for 11 MCCs with numerous buckets from size 1 NR and R to size 5 NR and R on one job that I sold and trained one of my customers on how to draw a common control schematic that we used in order to make their order entry more expedient.
I even trained my distributor to do control circuit modifications.
And there is really no good reason to disconnect the unfused side of the CPT that is commonly the grounded conductor (which really isn't a neutral). Depending upon how the control circuit is energized if it has a CPT then there should be a door handle mech that you pull down to open the door which opens the disconnect, disconnecting power to the the CPT.
If separate power there is commonly an inlk switch on the door hndl mech that disconnects the power from the control circuit. And, there should be some sort of signage which indicated that there is separate power, the wiring may be yellow instead of red if I not mistaken. Blue is commonly uses for DC if I remember correctly.
As such one should never be able to open an enclosure without disconnecting the power first.
