Two sources Feeding a Panel

[aashish.pant7]

I have a project where owner wants to feed a panel 400Amps (277/480) from two different breakers (200Amps trip each) in the main switchgear. Is this possible to do? Does the code allows such arrangement?

Thanks in Advance

 

[tom baker]

Yes can be done but not at the same time. Will need breaker interlock, Kirk key, or manual transfer switch.
It's an interesting question, I am not sure what the appropriate code rule is.

 

[hillbilly1]

Sounds like a UPS bypass? Those generally have two sources, but as Tom said, they are mechanically interlocked.

 

[jim dungar]

Yes can be done but not at the same time. Will need breaker interlock, Kirk key, or manual transfer switch.
It's an interesting question, I am not sure what the appropriate code rule is.

It would be an issue of parallel protective devices and conductors

 

[winnie]

If the customer wants 400A of capacity by paralleling two 200A feeders on separate breakers, then this is likely not a viable approach.

If the owner wants redundancy by being able to select between two feeders then there are ways to do it.

-Jon

 

[roger]

If the OP is wanting to connected them in parallel 240.8 (2011) is the article section.

Roger