Two Meters - Phase and Neutral Are Taken Separately - Do the Two Meters Run?

What did your electrician tell you when you asked him why he did that? Sounds like a shortcut.

If he did not know why he did what he did, he is not an electrician.

Meters only measure the amount of electricity that flows through them.

Possible effect on kWh units recorded is given below, however, I am more concerned about the loading.

A meter is made for its rated current, but taking a neutral current to another circuit could add extra current exceeding its rating. Correctly connected, the meter neutral is protected by the fuse in the live (phase) lead. Regulations usually prohibit fuses in the neutral wiring.

Laws one and two of electrical regulations are that conductors should be rated for the expected load and protected against overcurrent causing excessive temperature - otherwise fires could and have resulted.

I suggest you contact your electricity supplier and call for a visit by the "safety" man.

In the normal way of things, meters have two input terminals for supply and two output terminals for the load.

But the current is only measured in the phase wire - so you will not get double metering (twice the kWh units you are really using).

Without magic vision, I cannot see if your two meter input neutrals are connected by a short, thick wire so they are at the same voltage - if they are not at the same voltage, then the voltage coil of the meter may get a different voltage to the load and read high or low.

Poor practice maybe, possibly even dangerous but kWHr meters only measure the line current not the neutral.

1. Is there some reason why the installation was done in this way?
2. Is there some reason why it cannot be re-wired so that it is correct?
3. Has the electrician's invoice been paid yet?

Meters don't "run". You seem to mix the words meter and motor. Which is it? And how is a neutral, which is common to ground/earth in most cases, "from a separate circuit"? In other words, do you even know what you are complaining about here?