Is there a difference between connecting the meter into and out of the zero line and connecting it alone?

There is no difference. 1 and 3 are incoming lines of electric meters, 2 and 4 are outgoing lines of electric meters, which are loads, and the electricity consumption of 2 and 4 is the electricity consumption of electric meters. How many wires are connected to 1 and 3 will not affect the meter, as long as there are no other wires on 2 and 4.

The diagram below shows the wiring diagram of a single electric clothing (electronic watch).

(1), it will cause fluctuations inside the watt-hour meter or electronic watch. The voltage coil is undervoltage, which makes the voltage loop open, resulting in no voltage loop. In this way, the electricity consumption will not count.

(2), will cause the watt-hour meter and electronic meter. The current coil has no loop, and the same result is an electric energy meter or an electronic meter, which does not calculate the electricity consumption.

(3) When installing the single-phase watt-hour meter, the wiring is not connected to the zero line. There is no zero line in the corresponding situation. In this case, you can't use electricity at home unless you connect the zero line. Either use a temporary ground wire,

Extended data

1, the zero line is connected with the live wire, and the indoor switch of the user fails to disconnect the live wire, leaving a hidden danger for the safe use of electricity.

2. For the meters installed in a highly centralized way, when replacing the meters and cleaning the lines after replacing the meters in batches, the wiring and connection of the lines were not carefully checked, but the originally used zero line was wrongly wired into a live line.

3. The leakage of the electric meter is connected to the zero line or has poor contact with the zero line entering the electric meter. In this case, the user's power line table usually returns the live line to the overhead pole before getting off the pole and entering the house. The zero line is connected from the main line. The zero line of the electric meter is actually connected as an electric meter, which only plays the role of normal measurement, and the electric meter does not output the zero line to the user.

4. When installing new meters in batches in residential quarters, due to the centralized installation of dozens of meters, individual identification errors, dropped lines, incompleteness, etc. occur when multiple subscriber lines are wired to the meter collection box. May occur, resulting in wiring errors, which may cause the family to receive another meter.