When installing a 20KW generator on a residential 400amp service using a 200amp rated transfer switch. We used the transfer switch outside to protect one of the panels by the generator. The inspector is saying now I need to add a 200amp disconnect outside for the other electrical panel so the disconnects are grouped. Is this correct or is there a code article I can reference that states an exception for a generator disconnect not being required to be grouped together? Any help would be appreciated.
Generator
- Thread starter triplex15
- Start date
- Status
- Location
- Connecticut
- Occupation
- Engineer
I don't think 225 would apply since you're dealing with Services.
It sounds like you have two sets of service entrance conductors from one service drop or lateral. This is permitted by 230.40 Ex. No. 2, where the disconnects for each set of service entrance conductors are grouped at one location.
It sounds like you have two sets of service entrance conductors from one service drop or lateral. This is permitted by 230.40 Ex. No. 2, where the disconnects for each set of service entrance conductors are grouped at one location.
texie
Senior Member
- Location
- Fort Collins, Colorado
- Occupation
- Electrician, Contractor, Inspector
As others have said, I think the inspector is correct, based on what I am reading in your description. In addition, is the transfer switch service rated as required for this application?
I may be wrong but 230.72b deals with "Additional" Service disconnects.
I would say if your transfer switch did not switch the Neutral then the Generator could not be considered a Seperately Derived System and would not be considered a seperate service. Therefore your back to dealing with one service where all of the disconnects are to be grouped in one location, but like I said, don't quote me on this, I may be wrong.
I would say if your transfer switch did not switch the Neutral then the Generator could not be considered a Seperately Derived System and would not be considered a seperate service. Therefore your back to dealing with one service where all of the disconnects are to be grouped in one location, but like I said, don't quote me on this, I may be wrong.
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