sub-panel mains

[badjeepr]

when do sub-panels require a main, Article references only please.

 

[jumper]

Never, although OCPD is required.

 

[chris kennedy]

Article references only please.

215.3, 240.21.

 

[jumper]

215.3, 240.21.

But, I wanna use fuses.

 

[chris kennedy]

But, I wanna use fuses.

You work for Bussman?

 

[Dennis Alwon]

when do sub-panels require a main, Article references only please.

Article 225.33 a main is required if there are more than six circuit breakers. The six throws of the hand can be the disconnect but if there are seven then a main is needed.

 

[jumper]

You work for Bussman?

I admit, I read too many of charlie b's posts.:grin:

 

[Dennis Alwon]

But, I wanna use fuses.

You can but it still must be the main or no more than 6....in the scenario I mentioned

 

[jumper]

You can but it still must be the main or no more than 6....in the scenario I mentioned

Thanks. I know. I believe the OP was referring to when is a main breaker needed and I was just fooling around. A main breaker is never required in a sub panel was my point. There are other methods.

As I told Chris, I read too many of charlie b's posts.

 

[hurk27]

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.

 

[Twoskinsoneman]

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?

 

[Dennis Alwon]

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

 

[Twoskinsoneman]

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.

 

[hurk27]

Agreed. "or even outdoors" seemed to imply something else.
Indoor/Outdoor should not play into at all I think.

I just meant when we mount an R-3 panel like in one case I did an R-3 200 amp for holiday lighting out in a yard behind some bushes, and since it was considered a structure it needed a main and electrode system, but yes in any other place but the building that supply's the subpanel.