We are currently building an addition to our house. It was a duplex before (one part stick built, other part mobile home, they were connected by a common entryway). We moved the mobile home away and are building a stick built addition that will also have a 'mother-in-law suite'. Before, we had two separate meters for each duplex half. We would like to keep this setup with the new addition.
I have been told by an electrician that this was against code. He said he talked to the electrical inspector as well and he stated we could only do that if we had a fire wall between the two units.
I have been doing some reading and my understanding of the code does not reflect this. We have one service to the building (transformer from the electrical utility) that just happens to be connected to 2 meters. So while we can have only one 'service', we can have multiple 'service entrances', no?
So the question is can we have 2 meters for one structure that had 2 units in it? We have to follow 2017 NEC. This is in Minnesota, Blue Earth County. The utility is a local cooperative. The County does not impose or inspect anything here, the only aspect they consider for building permits is zoning and setback compliance, so they do not have a building code. Electrical is inspected by the State of Minnesota.
This is what we currently have (third meter is for an outbuilding on the property)