He wants to use a single meter now, but preserve the ability to revert back to two separate meter bases if he rents separately. A simple manual transfer switch as demonstrated above would do this, and likely best done as a subpanel as mentioned.
And would require a change in bonding now and later.
Answers based on the National Electric Code. Always check local amendments.
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Something similar happened to my house right before we bought it... Was previously 2 family dwelling when owner (at the time) didn't want to keep paying for 2 sewage accounts while it was vacant. She called up and changed it to 1 account and thought everything fine. When I called up to verify zoning status, I was informed it was changed to single family dwelling because of previous owner changing sewage to 1 account and since it did not meet current parking space requirements, it would be denied a 2 dwelling zoning classification again.
Originally Posted by AllanJ
(copied from another forum)
I would recommend not getting rid of the second meter and the second service.
The building is more valuable as a two family compared with being a single family. If you combine the electric services and also do things to make it look like single family usage, the building could be reclassified as single family. The zoning for the neighborhood could change to single family, too, if yours is the last two or more family building. It would take and act of God. or at least an act of Congress, or at least a big hassle with the local planning board, to rezone as multifamily again.