I think I can understand it according to your idea
It is true that the electricity generated by the generator does not need to be connected to the mains electricity network, and it is not necessary to distinguish neutral and live wires
Also, if the output end of the generator is not grounded, there will be no distinction between the neutral wire and the live wire tension. This 220 V can be considered as the line voltage.
But it may be a habit developed by old electricians. I think I should respect others and pretend to be cool.
Just for fun, grab an extra electric test pen and click. on it twice, that way that other person can feel comfortable and your work can be done without a problem. Obviously this person's technical affairs are very bad, so there is no need to compete with him.
L: live line, N : neutral line.
1. Use color to distinguish: In power cables, green and red represent phase A, phase B and phase C respectively (the wire under three-phase voltage represents neutral). The line, and yellow and green are two colors. Represents the ground wire.
2. Use an electric pen to distinguish: the live wire will glow when tested with an electric pen, but the neutral wire will not.
3. Use a voltmeter to distinguish: the voltage between the phase wires (that is, the live wire) is 380V, and the voltage between the phase wires (live wire) and the neutral wire (or a good grounding body) has a phase voltage of 220 V, and the voltage between the neutral line and a good grounding body earth is 0 V.
Detailed information:
Notes:
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Depending on the loadof the electric meter, inductance coils with different transformation ratios can be used to meet the usage requirements. For example, if an electric meter with a specification of 3x1(2)A is used with an inductor coil and the inductance coil ratio is selected as 1:50, the maximum current rating that each phase can carry is of 100 A.
According to regulations, the neutral wire of the 380 V civil power supply must not be earthed at the input. If grounding is carried out on the transformer side, this grounding must take into account that the floating potential cannot cause a potential higher than the supply voltage. There is some resistance in the ground between the user side ground and the user side ground. the end of the transformer. The power supply method is one live wire and one neutral wire, it isi.e. the conductive wire of the neutral point, forming a loop. There is also a ground wire connected to the single-phase, three-conductor power outlet.