Derate 4/0 feeder

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daiashi

daiashi

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Location
NC
In my area in nc, inspectors are calling people using the spaces
on an outdoor 200amp disconnect to feed anything but the indoor
loadcenter.Ex. branch circuit to a heatpump.If the available spaces
outdoors are used then you have to derate the indoor feeders.Any ideas?:)
 
daiashi said:
In my area in nc, inspectors are calling people using the spaces
on an outdoor 200amp disconnect to feed anything but the indoor
loadcenter.Ex. branch circuit to a heatpump.If the available spaces
outdoors are used then you have to derate the indoor feeders.Any ideas?:)
Click to expand...
this can mean that T.310.15(B)(6) does not apply since it doesn't carry the entire load of the service. Is that what you mean?
 
I think it has some thing to do with 310.15(b)6
I am not sure derate is the proper terminology in this case.
It is the new ampacity's allowed .
It's a pain , heh?


Okay Dennis beat me.
 
Thats the best idea I can come up with.By using the outdoor buss,
you are no longer allowed to use 310.15(B)(6) but 310.16.This
sound correct?
 
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