NEC 230.70

[Isaiah]

We have two small buildings of about 200square feet each within approx 15 feet of each other.
One building has a panelboard with an 100A MCB and around 18 branch CBs.
I wanna feed the other small building from this panelboard - this panel only has 4 CBs with no MCB.
I just want to be sure a MCB is NOT required here since it’s only 4 CBs.


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[jim dungar]

230.7 only applies to the utility service conductors. You need to be looking at feeders to separate buildings.

 

[Elect117]

Basically the same rule. 225.30.

I would say a MCB is required.

* EDIT * or individual Disconnects for each "feeder" to the building. If less than 6.