Provided that the feeder conductors and the panelboard they feed are properly protected by the overcurrent protective device in the main distribution panel, a main circuit breaker is not required in the remote panelboard.
Chris
Doesnt that depend on if the Remote Panelboard is located within the same structure or not?
JAP>
I felt that would be good for him to know.
JAP>
Is there a code which states that the remote panelboard fed from a main switch board need to have a MCB in it? I know the cable to the remote panel board are protected by the breaker inside MSB that feeds the remote panelboard.
If it is a matter of meeting the minimum NEC requirements and/or cutting cost that is one thing. But if those are not the issue opt for the small additional cost of a main breaker as it is is always logical to locate the main disco and turn off the power of the panel if there should be an urgent need to do so.