Is there a difference between phase line and fire line?

1. In order to make alternating current have convenient power conversion function, industrial electricity usually uses three-phase sinusoidal alternating current, and the phases of current (reflecting the direction of current) are different from each other by 120 degrees.

Usually, we call each such conductor a phase line (live wire).

2.GB 50258-96 Code for Construction and Acceptance of Electrical Equipment Installation Engineering 1kV and below Wiring Engineering? Article 3. 1.9 stipulates that when multi-phase wires are used for connection, the colors of phase wires shall be easy to distinguish.

The colors of phase line and zero line should be different. The colors of wires in the same building and structure should be uniform. Protective ground wire (PE wire) should be yellow-green insulated wire, and neutral wire should be light blue insulated wire.

3. Two wires in the lighting circuit, one is called live wire and the other is called zero wire. The difference between live wire and neutral wire is that their voltage to ground is different: the voltage of live wire to ground is 220V V V.

The voltage of neutral line to ground is equal to zero (it is itself grounded).

So when one part of a person touches the fire line and the other part stands on the ground, the voltage between these two parts of the person is equal to 220V, and there is a danger of electric shock.

Instead, people grab the zero line with their hands. If a person is standing on the ground and the voltage between the neutral line and the ground is equal to zero, then the voltage between all parts of the human body is equal to zero, and there is no danger of electric shock.

Extended data:

Firewire precautions.

(Connected):

1, to prevent electric shock and short circuit;

2. Pay attention to the switch to control the fire line;

3. It is best not to connect the fuse to the zero line;

4. The central part of the lamp holder is connected with the live wire;

5. Do not mix ground wire and zero wire;

6. Disconnect the live wire with electrical appliances, so that contact with electrical appliances will not get an electric shock. If the neutral line is broken, people will get an electric shock.

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