Service Entrance Conductors Through Panelboard To ATS & Then Back To Main

[SIRSPARKSALOT]

A residential customer is looking for a generator installation. There is an existing 400A underground installation. From the meter pan (320A) mounted outside the garage, the conductors enter the right side of the panelboard mounted within 3" of the wall. The original idea was to remove the service entrance conductors from the main and pass them through to an ATS located directly to the left of the panelboard and then nipple right back into the main. Would this be a compliant installation?

I have looked, but nothing comes to mind other that 230.7, but we are not talking about a raceway...Also,

408.3(A)(3) Seems to prevent this...Can I install my own barrier?

Lastly, could I pass the service entrance pipe through the enclosure and then nipple back.

Any help is greatly appreciated.

 

[JDB3]

Would it be possible for you to post a picture as to what is currently there & what you propose to do ?

 

[Smart $]

...
408.3(A)(3) Seems to prevent this...

408.3(A)(3) applies to switchboards... not panelboards.

 

[augie47]

A residential customer is looking for a generator installation. There is an existing 400A underground installation. From the meter pan (320A) mounted outside the garage, the conductors enter the right side of the panelboard mounted within 3" of the wall. The original idea was to remove the service entrance conductors from the main and pass them through to an ATS located directly to the left of the panelboard and then nipple right back into the main. Would this be a compliant installation?

I have looked, but nothing comes to mind other that 230.7, but we are not talking about a raceway...Also,

408.3(A)(3) Seems to prevent this...Can I install my own barrier?

Lastly, could I pass the service entrance pipe through the enclosure and then nipple back.

Any help is greatly appreciated.

As much as I would dislike the idea, as long as you don't share a raceway, I can't see a violation.

408.3(A)(3) applies to switchboards... not panelboards.

Huh ? That section differentiates ??

 

[Smart $]

...
Huh ? That section differentiates ??

Yes, it does...

408.3 Support and Arrangement of Busbars and Conductors.

(A) Conductors and Busbars on a Switchboard or Panelboard.
Conductors and busbars on a switchboard or panelboard
shall comply with 408.3(A)(1), (A)(2), and (A)(3)
as applicable.

...

(3) Same Vertical Section. Other than the required interconnections
and control wiring, only those conductors that
are intended for termination in a vertical section of a
switchboard shall be located in that section.
Exception: Conductors shall be permitted to travel horizontally
through vertical sections of switchboards where
such conductors are isolated from busbars by a barrier.

 

[ceb58]

A residential customer is looking for a generator installation. There is an existing 400A underground installation. From the meter pan (320A) mounted outside the garage, the conductors enter the right side of the panelboard mounted within 3" of the wall. The original idea was to remove the service entrance conductors from the main and pass them through to an ATS located directly to the left of the panelboard and then nipple right back into the main. Would this be a compliant installation?

I have looked, but nothing comes to mind other that 230.7, but we are not talking about a raceway...Also,

408.3(A)(3) Seems to prevent this...Can I install my own barrier?

Lastly, could I pass the service entrance pipe through the enclosure and then nipple back.

Any help is greatly appreciated.

That's fine as long as you understand the ATS will have to be service rated or a disconnect installed between the meter and ATS. What amp size is the panel board and conductors feeding it?