Article references only please.
215.3, 240.21.
But, I wanna use fuses.
when do sub-panels require a main, Article references only please.
You work for Bussman?
But, I wanna use fuses.
You can but it still must be the main or no more than 6....in the scenario I mentioned
A subpanel in the same building never needs a main because we are required to protect the feeders at the source to the subpanel, but when a subpanel is located in another building or even outdoors and has more then 6 breakers in it, while a main is still not required as a disconnect could be used ahead of it, but just installing a main breaker panel, and adding the ground bars is so much cheaper.
What is the code ref for this?
I think Wayne meant if the subpanel is outdoors in a separate building not just outdoors.
Otherwise i see two references 225.33 & 408.36
Agreed. "or even outdoors" seemed to imply something else.
Indoor/Outdoor should not play into at all I think.