service disconnect needed?

[GG]

Hello, Im going to install a 320 amp 3 phase meter base on the outside of a building. Can I install a 6' gutter on the other side of the wall on the inside of the building, run my service conductors into this gutter, and then tap these conductors to feed 2-200 amp 3 phase main breaker panels? Or will I need to use a 400 amp fused disconnect to protect the conductors that enter the gutter?

 

[charlie]

Re: service disconnect needed?

It is the call of the AHJ. The installation is not in strict compliance with 230.70(A) but I would pass the installation. In my opinion, the installation is reasonable but is a Code violation.

 

[inspector 102]

Re: service disconnect needed?

I would wonder if the gutter were placed on the outside, then nippled through the wall to each panel grouped together might not be a better application. Then it would be easier to state that the disconnects are immediately upon entering the building. I have seen it done boths ways and like Charlie stated, it can be a local inspectors call on what the code allows. This might not be a violation, but another interpretation.

 

[GG]

Re: service disconnect needed?

Charlie, would 230.90 also apply to my installation? It would seem after reading 230.90 that I cant terminate the service conductors in the gutter without overcurrent protection ahead of them. A tap in the gutter would qualify as a termination? Thanks

 

[charlie]

Re: service disconnect needed?

Inspector 102, there is no question that your method is Code compliant. The service entrance conductors may wrap around the building before entering and hitting the service equipment.

 

[charlie]

Re: service disconnect needed?

Charlie, would 230.90 also apply to my installation? It would seem after reading 230.90 that I can't terminate the service conductors in the gutter without overcurrent protection ahead of them. A tap in the gutter would qualify as a termination?

230.90 is concerning the service overcurrent protection which is required to be with the service disconnecting means. A tap in the gutter would not qualify as a termination in service equipment.

 

[thinfool]

Re: service disconnect needed?

Where I am, this job wouldn't need the gutter. bring two nipples thru the wall, one into the back of each panel. Feed each panel with 3/0. Use two barrel lugs in the meter base.
This configuration is very common here....your mileage may vary.

 

[charlie]

Re: service disconnect needed?

Actually, that is the way most are done in this area. From the outside, it looks like you only have an LB for a 200 ampere service, inside, you have 2 - 200 ampere panelboards side by side.