Fire line into the switch, zero line into the lamp
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In a domestic power environment, if there is a switch and a power device in a single-phase loop, the FireWire first passes through the switch and then connects the power device to ensure that the switch controls the circuit on the fire line. This is also known as the "fire line into the switch, the zero line into the lamp."
If, on the other hand, the switch is installed on the neutral line, the FireWire first passes through the electrical equipment. Although it can also control the operation of the equipment, it will increase the risk of installation or maintenance.
For example, if a chandelier needs to change a light bulb, the normal operation is to put the switch in the off state and remove the light bulb to replace it with a new one. However, if the switch is installed at the neutral end, the pendant is still live when the switch is closed. If the operator accidentally touches the FireWire end of the pendant lamp, the human body that is connected to the ground replaces the original zero line and forms a circuit with the FireWire, causing a leakage accident and causing damage to the human body.
Therefore, the "fire line into the switch, the zero line into the lamp" in the circuit must be strictly enforced in the transformation of the standard, the owner can refer to the decoration company to provide the indoor electrical circuit diagram site acceptance.
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