Detached building Sub Panel

[splinetto]

What is the # of ckts in a detached building before a Main disconnect is needed? Of the top of my head I think it is four but I cant find it in the book.

 

[stickboy1375]

Art 225.33(a)

 

[jwelectric]

Be sure to look at your panel and see if it has a label that says anything like this one.

If it does remember 225.31 and 225.36

 

[radiopet]

and 225.32 is helpful as well...

 

[tryinghard]

What is the # of ckts in a detached building before a Main disconnect is needed?

One, in keeping with 225.31, basically you cannot supply circuitry to another building without also providing a disconnecting means. The main intention of this code is to have a single location to open the supplying circuit in the event of an emergency.

If you have a situation with an outbuilding (or storage) with a light, switch and receptacle, then you can provide one branch circuit to the outbuilding but it still has to route through a main disconnect, this can be a SP snap switch. With this same example if you add a 220v dryer or well circuit then you should feed the outbuilding and distribute through a sub panel (as a main disconnect accessible as per 225) it can include up to 6 breakers before a single main breaker is required in it.