The use of wire tubes can protect the wires very well, avoid acid and alkali damage to the wires, and prevent rodents and insects from eating the wires. When the wires catch fire due to overheating, it can effectively prevent the occurrence of fire. The wiring of home decoration generally uses PVC plastic pipes as wire protection pipes. When laying the wire through the pipe, the total wire cross-sectional area of the wire should not exceed 40% of the inner diameter of the wire pipe. When designing the wire laying, the wire and the signal wire cannot pass through the same conduit to avoid mutual interference.