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There must not be ANY ungrounded receptacles connected to the service, the wiring has to be up to code.

Ragnar, I don't quite get this. Is your building that old that it doesn't have earthed wiring?

Or is it just certain branches that are unearthed? Seems weird.

This sounds like you have to re-do the entire apartment's wiring - or at least the sections that aren't grounded.

Sounds to me like a good argument for leaving the meter in place and not moving it until the entire apartment is ready to be gutted and re-built from the ground up! This time with grounded wiring. [Linked Image]