800A parallel feed service

[Aaron_m]

when feeding an 800A service via parallel al750's, is it necessary to terminate into one 800A service disconnect, or can each set be terminated into separate 400A service disconnects?

 

[Dennis Alwon]

when feeding an 800A service via parallel al750's, is it necessary to terminate into one 800A service disconnect, or can each set be terminated into separate 400A service disconnects?

You can have 2 400 amp disconnects or 4 - 200 amp disco. either way is fine

 

[Aaron_m]

Even if each d/c is connected to different sets of the parallel svc feed?

 

[augie47]

If you are "paralleling" with two different conduits with one going to one disconnect and one the other (which actually would not be a parallel), I see no problem.
If you are paralleling thru one conduit and you hit one disconnect first, routing thru it, you might be in violation on NEC 312.8.
Your two service disconnects must meet 230.72

 

[Aaron_m]

it's a 480/277 svc, overhead feed through the ct's then in to the d/c's

 

[Aaron_m]

parallel feed through the ct's then into a gutter on the inside, dropping each set of the parallel into its respective 400A d/c

 

[Dennis Alwon]

parallel feed through the ct's then into a gutter on the inside, dropping each set of the parallel into its respective 400A d/c

Should not be a problem.

 

[chris kennedy]

parallel feed through the ct's then into a gutter on the inside, dropping each set of the parallel into its respective 400A d/c

As Gus stated, you should drop the reference to parallel.

310.4 Conductors in Parallel.
(A) General. Aluminum, copper-clad aluminum, or copper conductors of size 1/0 AWG and larger, comprising each phase, polarity, neutral, or grounded circuit conductor shall be permitted to be connected in parallel (electrically joined at both ends).

You are only joined at one end.

 

[iwire]

1) Unless the conductors are 'electrically joined at both ends' (310.4) they are not 'in parallel' to the NEC.

2) 230.40 Exception No 2 specifically allows what the opening poster wants to do.

 

[Dennis Alwon]

As Gus stated, you should drop the reference to parallel.

You are only joined at one end.

Chris he may have parallel service entrance conductors in each conduit. Each 400 amp disco may be fed with parallel conductors.

 

[Aaron_m]

thank you very much. 800a iline panels are expensive when I can get away with a 6h rule

 

[Aaron_m]

Maybe I am abit confused, I have 2 sets of 750's coming in comprising the 800A svc. if I enter each set, post CTY cabinet, as there will be no splicing, into separate disconnects, being not in parallel, is that acceptable, or am I stuck with an 800A d/c?

 

[iwire]

It is fine per 230.40 ex 2.