【 Weak current College 】 ELV wire specifications

Household electricity, divided into strong electricity and power. "The strong electricity" means the provision of driver, electric energy for lighting, in China the ordinary family generally is 220V AC. "Weak" means using electronic signal implementation of video, audio and other data transfers within the family, generally refers to video and telephone signals, computer data transmission and visual alarm system and so on.

Indoor use of strong electrical transport, power transmission power lines using different specifications of the signal cable. Wire platoon set when compliance with the following specifications:
1. dark line laying must piping. When the pipeline length exceeds 15m or two right-angle bending, should an additional pull cable boxes.
2, plastic wire protection tubes and junction box must be flame retardant products, appearance should not be damaged and deformation.
3. metal wire protection tubes and junction box appearance should not be folded flat and cracks, tube should be no burrs, tube should be formed.
4. power cable harness, wire cross section area should meet the electrical equipment of the maximum output power.
5, the same circuit wires should be put into the same root canal, but in the total number should not exceed 8 root, wire total cross-sectional area (including insulation jacketing) should not be longer than the tube section area of 40%.
6. power cable and signal wire must not be put into the same root canal.
7. power cable and Sockets and TV cable and socket level spacing should not be less than 500 mm, wire intersection must a 90-degree angle to avoid bevel crosstalk.
8, wires and heating, hot water and gas pipe between parallel distance should not be less than the distance 300mm, cross shall not be less than 100mm.
9, into the pipe wire connectors should be located in the junction box, connector lap should be firm, insulating tape wrapped tightly should be uniform
10, traverse and wire-to-ground resistance must be greater than 0.5 M Ω
11, the same interior of power, telephone, television and other socket panel should be in the same level of elevation, altitude difference should be less than 5mm.
12, the ceiling is not allowed to have extra-low conductors.