60A Subpanel Questions

[JFletcher]

Are we allowed to run 6/3 UF (or NM) to a subpanel with a 60A main OCPD? I know there is no 55A breaker; are we allowed to go to the next largest OCPD, or do we have to go with a 50A breaker or #4 wire?

 

[topgone]

Are we allowed to run 6/3 UF (or NM) to a subpanel with a 60A main OCPD? I know there is no 55A breaker; are we allowed to go to the next largest OCPD, or do we have to go with a 50A breaker or #4 wire?

A #4 wire with a 60A OCPD is good.

 

[augie47]

If you calculate the load and its 55 amps or less you can use the #6 on a 60 amp. Otherwise its a #4

 

[Dennis Alwon]

I agree with gus-- 240.4(B) allows us to use the next size breaker if the load doesn't exceed the value of the conductor

 

[GeorgeB]

Are we allowed to run 6/3 UF (or NM) to a subpanel with a 60A main OCPD? I know there is no 55A breaker; are we allowed to go to the next largest OCPD, or do we have to go with a 50A breaker or #4 wire?

Assuming it is supplied by a feeder, not a tap, the OCPD main can be darn near anything ... 60, 100, 125, 200 ...

The feeder must be protected at its source in accordance with the code.

 

[petersonra]

Assuming it is supplied by a feeder, not a tap, the OCPD main can be darn near anything ... 60, 100, 125, 200 ...

The feeder must be protected at its source in accordance with the code.

and we have a winner!!!

 

[peter d]

I put them on 60's all the time with #6 NM or UF cable. No issues that I'm aware of since the load is rarely even close to that in a resi setting.

 

[JFletcher]

Belated thank yous for the comments/input.