There are two possibilities: 1. Your test pen is inductive (with an amplifier circuit and comes with a button cell as a power source). This type of test pen is inaccurate and the diode measuring the neutral line also emits a signal. loud noise. If you use a digital test pen and it shows more than ten volts, it doesn't matter. This only proves that the resistance of your earth is high. 2. There is a problem with your ground wire (short circuit or excessive ground). You place one end of the multimeter on the neutral line and the other end in a damp spot on the ground to see what the voltage is between the neutral line and ground. You can determine where the problem is.
1. You must first distinguish when the neutral line is. There is usually three-phase electricity coming out of the generator, that is, three live wires. Then there is the PE line problem andof. Line N always difficult. Do you mean the neutral line, the PE line, the N line or the PEN line? This needs to be clarified
2. If it's line N, then it's normal for it to be loaded? . The power generated by the equipment must be returned to the neutral point, otherwise the current loop is blocked. As for the voltage you are measuring, that means there is a grounding problem. There is no distinction between working earthing and protective earthing.
3. If it is a PE line, it is even more important. Attention, electrical safety must be analyzed in detail
4. If it's a PEN line, it is. is easy to understand and is equivalent to the N line.