2 Services 1 Meter

[WA_Sparky]

General question looking to see if the following is A. Code Compliant, and B. Possible issues.
For the given project we have an existing building (building 1), metered, and disconnect fed by an oversized transformer.
There will be a new building (building 2) 100' away (same owner).

Client said they need the existing transformer to feed (1) meter, to feed (1) ATS (both buildings will now be backed up by generator), the load terminal of the ATS is to feed a load break (acting as both service disconnects), and that feeds each building separately. If both building grounds are bonded, are there potential issues code or safety wise? I gathered from other posts 1 meter feeding 2 buildings is technically 2 services per NEC even though utility might view it as 1, since there is 1 meter charged.

Personally I would rather have 2 meters, 2 ATS's and keep everything separate but there is push back. Interested in hearing your thoughts.

 

[david]

If you have a utility owned transformer feeding a single meter as you describe in your thread you have one service

Very common

From the load side of the meter, you indicate service conductors suppling a transfer switch. I’m not familiar with the term load break. The transfer Switch should be service rated and provide the service disconnect from the utility

From a service disconnect you can run your feeder to the 1st building. You can also run a feeder to the 2nd building



You did not define the building occupation class some occupation classes may have restrictions as to what an emergency source is allowed to be supplying

Since you indicate building one to be an existing building, what are you going to be doing with the existing service to that existing building?

 

[kwired]

Like david mentioned in post 2, the ATS is likely going to either be the service disconnect or will require a service disconnect ahead of it. This makes the runs to each building feeders and not service conductors.

NEC definition of service may not match what a POCO calls a service. Most the time every meter is a service for the application of the POCO billing dept. But in a large multitenant those meters possibly are downstream from the NEC defined service disconnecting means.