This time we will introduce two wiring methods. The first one is:
One Grid connected to the casing
1. Use a red high-voltage wire to connect from the high-voltage output port of the voltage tester (choose AC or DC output according to usage) to the short contacts of the neutral and live wires of the tested object.
2. Use a black grounding wire to connect the circuit end of the voltage tester to the shell of the tested object (if the shell is made of insulating material, a metal conductor with good adhesion such as copper foil should be attached).

2. Grid electricity to ground
1. Use a red high-voltage wire to connect from the high-voltage output port of the voltage tester (choose AC or DC output according to usage) to the short contacts of the neutral and live wires of the tested object.
2. Use a black grounding wire to connect the circuit end of the voltage tester to the grounding wire of the tested object