How to carry out weak current wiring construction

Technical requirements for cable laying construction _

Cable laying should be straight, without twisting and looping, and should not be squeezed and damaged by external forces, especially optical cables; The bending radius must be more than ten times of the cable radius (4 pairs of twisted pairs should be more than 30 mm); If the optical cable and twisted pair are in the same trunking, do not put the optical cable at the bottom of trunking to avoid squeezing the optical cable. In vertical trunking, it is required to tie it to the trunking every 1m-2m.

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Both ends of each cable (terminal cabinet end and terminal outlet end) shall have the same, firm, clear and unified number (number labels shall be uniformly printed to avoid illegible handwriting). _

At the exit of the terminal, the cable should be pulled out with a wiring margin of not less than 50cm and coiled in the embedded box. Prevent damage to cables during construction in other processes.

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At the wiring cabinet, according to the situation of each floor, the cable wiring margin will be sufficient. (Generally, the cable enters the junction box and stays for 5 meters).

When wiring, it can't be pulled when the resistance is high. Be careful not to use too much force to prevent the cable core from being pulled out. We should first find out the cause of the fault and eliminate it. _

When laying cables, it is forbidden to cut and connect cables anywhere from the junction box to the terminal exit. _

Construction conditions for cable laying: _

All trunking, pipes, embedded boxes and transition boxes on the construction floor are installed in place, and the acceptance meets the requirements. After the cable is laid horizontally, it is absolutely forbidden to carry out pipeline reconstruction and electric welding to prevent the cable from being damaged. _

The interior wall and ground of the wiring room have been decorated, and the trunking (pipe) well has been installed. The installation position of the cabinet (rack) has been determined. After the cable is routed, civil works such as wall plastering and ground watering are not allowed to be carried out to prevent the cable from being damaged. _

The construction drawings are complete, and all terminal exits have been numbered uniformly on the drawings. After all the above conditions are met, the wiring construction can be carried out. _

In order to make the cable easier to check, we should not only mark it when threading, but also record the length of both ends of the cable.