2000 amp breaker

[scott minter]

Hi I have a 2000 amp breaker at my facility it is being fed with 5 runs of 600 kcmil per phase
it is 480 volts. onthe load side of the breaker it has 6 spaces (lugs) per phase, i am only utilizing
5 as i said. Working under the tap rule could i land 1 more 600 kcmil on the breaker and run it
10 feet or less to a 400 amp fused dissconnect. When this new disconnect would be in use the
larger loads inside would not be.

 

[ron]

Sounds good.

 

[kingpb]

Technically, yes, as Ron said.

Physically, it could be challenging to-get-her done with 10ft or less of cable. Better confirm your layout.

BTW: the fact that it is 2000A, load is not run concurrently or it is a 400A fused switch is inconsequential. At 2000A of current the protection will trip the breaker.

 

[petersonra]

I don't see a code issue here. whether there is room or not as another poster mentioned might be a problem.

 

[scott minter]

add on question

add on question

Thank you all for the answers. I have a follow up questions. Am i limited to 10 foot or does this scenario as described allow for 25 foot.

 

[augie47]

The 25 ft tap rule would require the "tap" conductors to have an amapcity of 1/3 the breaker rating

 

[scott minter]

2000 amp breaker

Thanks, that was all i needed.