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What are the standards for wire and cable construction?

Updated:12-11-2020
Summary:

Circuit short-circuit protection, load protection, wire […]


Circuit short-circuit protection, load protection, wire diameter selection, and low-voltage electrical installation (air conditioners, household appliances, etc.) should be carried out in accordance with regulations. When laying wires through the pipe, the total cross-sectional area of the wires in the pipe (including the outer sheath) should not exceed 40% of the cross-sectional area of the inner diameter of the pipe.
1. The laying of wires should be constructed according to the design regulations, and the lighting circuit and low-voltage circuit should be equipped with load protection.
2. Line short-circuit protection, load protection, wire diameter selection, and low-voltage electrical installation (air conditioners, household appliances, etc.) should be carried out in accordance with regulations.
3. When laying wires through the pipe, the total cross-sectional area of the wires in the pipe (including the outer sheath) should not exceed 40% of the cross-sectional area of the inner diameter of the pipe.
4. The line should be fixed, and the cable should be horizontal and vertical.
5. Concealed wires must use safe and reliable sheathed wires, and buried wires are not allowed to have wired connectors.
6. The socket should be about 200mm away from the ground, and each line in the wire box must be left with a thread end of at least 150mm in length (left neutral wire, right phase wire) for maintenance.
7. For wiring, the phase line enters the switch and the neutral line enters the lamp holder.

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