What does the electric pen display 12/36/55 mean?
The digital electric pen has the function of measuring the voltage value, which is normally divided into several levels of 12 36 55 110 220.
If only 12 is displayed, it means that the voltage you measured is about 12V. If all these numbers are displayed, take the maximum value on the far right, which is 220V. It means that the voltage you measured should be about 220V. If it feels numb It should be due to the leakage current. Does the air switch in the home have a leakage protection function? Is the water heater well protected and grounded? It is also likely that the neutral wire and the live wire are reversed. The normal switch should control the live wire, but if the live wire and the neutral wire are reversed, the switch only controls the neutral wire, so there will be leakage current. Find an electrician to check it, otherwise This is very dangerous, no matter how safe the use of electricity is the most important!
