The fact that the meter works is primarily to obtain voltage and current.
As long as the neutral and live wires on the outside pass through the meter anyway, the meter will get the voltage and current when it reaches the electric current. Charge, so the meter will go.
Since the current sensing component in the meter is connected to the live line of the meter, if the connection is reversed, the current will flow through the load equipment and the neutral line and pass through the current sensing component. , and current can still be obtained. Voltage can also be achieved without fire, voltage is the same either way.