kallileo
Lifetime Supporting Member
In all of our panels we have the supply go though the main 4 pole disconnect switch, to main MCB and from there to thermomagnetic circuit breakers which supply motor contactors and to single pole MCBs which supply power supplies, control transformers or any other single phase loads.
Is the main MCB really required in all cases or it's possible to feed thermomagnetic circuit breakers and single pole MCBs directly from the main disconnect switch without installing the main MCB?
Is the main MCB really required in all cases or it's possible to feed thermomagnetic circuit breakers and single pole MCBs directly from the main disconnect switch without installing the main MCB?