Two 200 amp subpanels & 10ft tap rule??

[hardworker]

I have a 400 amp disconnect. I need to run a 60 ft. run of 3/0 from this disconnect to a 200 amp main breaker load center. From this same 400 amp disconnect, I need to run a 70 ft run of 3/0 to another 200 amp main breaker load center.

Does code require I set two 200 amp disconnects within 10 ft. of the 400 amp disconnect and then make my runs from them? OR can I just come directly off the 400 amp disconnect?

I am a little fuzzy on this. 10 ft. tap rule is giving me trouble understanding????

 

[augie47]

The only tap rule that would allow you to run over 25ft would be the "outside tap rule" in 240.21(B)(5)

 

[infinity]

Your two 200 amp disconnects could use the 25' tap rule.

 

[hardworker]

Your two 200 amp disconnects could use the 25' tap rule.

In plain English, can I do it without the two 200 amp discounts? I get confused trying to interpret code. Does "outside" mean outdoors or just "beyond" ? This is all inside a commercial building, subject to strict code inspection.

 

[augie47]

In plain English, can I do it without the two 200 amp discounts? I get confused trying to interpret code. Does "outside" mean outdoors or just "beyond" ? This is all inside a commercial building, subject to strict code inspection.

Plain English:
NO

You are limited to 25ft !