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Discussion Starter · #1 ·
Working on a residential project. Client is having me install a 400 amp service in an obscure way. Basic set up is 2 200 amp panels. 1 is to be located in the garage 40 feet away. So i have to install a 200 amp breaker next to the main panel (positioned for easy runs to attic). My plan was to bring in 2 sets of 4/0 AL through 2.5" schedule 40 PVC into the breaker enclosure. 1 set would feed the disconnect and the other set would pass through the disconnect, through a nipple, into the main panel. AHJ is telling me i cant pass through the disconnect because of 230.7 and 230.70(a). I believe 312.8 applies which permits my plan. 230.70(a) seems to be really nitpicky as the nearest point of entry is like 2' away. And i really dont see how 230.7 applies.
 

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The service disconnecting means has to be at closest point where service entrance conductors enter the structure. 'passing through' the first disconnect to 40' away to second disconnect violates this. I would put up 400a service rated fused disconnect and bring parallel conductors to this. Bond everything, than the 2 panels become sub panels no Main breakers needed.
 

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I quoted some of the code for reference.

The gutter space of a panelboard cabinet or other electrical equipment enclosure is not a raceway (as defined in Article 100) and is not subject to the requirement of 230.7

This is part of 312
(3)
A warning label complying with 110.21(B) is applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors
 

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Discussion Starter · #4 ·
The service disconnecting means has to be at closest point where service entrance conductors enter the structure. 'passing through' the first disconnect to 40' away to second disconnect violates this. I would put up 400a service rated fused disconnect and bring parallel conductors to this. Bond everything, than the 2 panels become sub panels no Main breakers needed.
The panel 40' away would be fed from the disconnect with 4 wires. The disconnect would essentially be a main panel. So in the enclosure, 3 wires terminate, 4 wires originate , and 3 pass through
 

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I quoted some of the code for reference.

The gutter space of a panelboard cabinet or other electrical equipment enclosure is not a raceway (as defined in Article 100) and is not subject to the requirement of 230.7

This is part of 312
(3)
A warning label complying with 110.21(B) is applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors
This is a SERVICE. Disconnecting means has to be closest point where se's enter building. Which is why inspector referenced 230.70a
 

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Discussion Starter · #6 ·
I quoted some of the code for reference.

The gutter space of a panelboard cabinet or other electrical equipment enclosure is not a raceway (as defined in Article 100) and is not subject to the requirement of 230.7

This is part of 312
(3)
A warning label complying with 110.21(B) is applied to the enclosure that identifies the closest disconnecting means for any feed-through conductors
This is a SERVICE. Disconnecting means has to be closest point where se's enter building. Which is why inspector referenced 230.70a
230.70a is such a stretch. Conduit through the foundation into an LB into the breaker enclsoure. Disconnect A (200 amp breaker) and Disconnect B (my main panel) are going to be within 2 feet of each other. I mean if you really want to get technical, the nearest point of entry would always be the back of the disconnect right above the main breaker.
 

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230.70a is such a stretch. Conduit through the foundation into an LB into the breaker enclsoure. Disconnect A (200 amp breaker) and Disconnect B are going to be within 2 feet of each other. I mean if you really want to get technical, the nearest point of entry would always be the back of the disconnect right above the main breaker.
I interpreted your first post as saying you were running one set of se's to a disconnect, and the other set you were going to pas thru the disconnect and go 40' away before there was a disconnecting means. If I misinterpreted...my apologies.
 

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Discussion Starter · #9 ·
I interpreted your first post as saying you were running one set of se's to a disconnect, and the other set you were going to pas thru the disconnect and go 40' away before there was a disconnecting means. If I misinterpreted...my apologies.
No worries. just to be clear, I want to run 3 wires to a disconnect and then 4 wires from that disconnect to the subpanel 40' away. I also want have 3 more wires pass through that disconnect to the main panel which would be within 2'.
 

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One question may be...is the breaker disconnect a panel as recognized in 408? If an enclosure, 312 applies and 'barriers' is listed and is compliant as long as space is sufficient.
In a panel every wire that enters or leaves it, must be connected to either a breaker or lug. Cannot pass thru. However the inspector did not reference 408.
I have used a raceway to pass se's through a trough, (312),
but not a safety switch, panel or breaker disconnect.
 

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Maybe I’m misunderstanding but it sounds like your service disconnects would not be grouped?
That's how I am seeing it. Service discos must be grouped. I assume the garage is attached?
 

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Didn’t he say they were two feet apart?
The point of entry was 2' away so I presume he had one disconnect inside and one outside
 

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Discussion Starter · #19 · (Edited)
The point of entry was 2' away so I presume he had one disconnect inside and one outside
Ok, so i was going to bring a piece of conduit through the wall, LB into breaker enclosure, then nipple into main panel. from entry of service conductors, there will be approximately 2' from main panel. I suppose i could just come inbetween the panels with a "T" conduit body and feed each panel that way.
 
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