How to verify a single-phase socket with a non-contact voltage tester pen inspection lamp
Single-phase two hundred and two sockets are often divided into two holes and three holes. The left, middle and right of the two holes are the phase, and the left, middle and right phase are the ground.
Single-phase 220 sockets, cross-connected inspection lights for verification. The left, middle and right are connected to the inspection light, if the light is normal, it is correct. The open circuit fault light is off, and the bad contact light flashes.
The three-hole socket is tested, and the upper ground light of the right phase is also on, and the left middle and upper ground light is not on, otherwise the wiring is incorrect.
