What is a pre branch cable? What's the use of it?

Release time ：

2018-07-24

Pre branch cables are mostly used for power distribution trunk lines of high-rise buildings (trunk power distribution mode).

What is a pre branch cable? What's the use of it?

Pre branch cables are mostly used for power distribution trunk lines of high-rise buildings (trunk power distribution mode).

The main cable conductor has no joint (the joint has been made in the factory and sealed in the branch point).

Pre branch cable power distribution is similar to bus duct power distribution, but the cable has good anti-seismic, airtight, waterproof performance, small space occupation and convenient installation. The disadvantage is that the quality fault is difficult to repair on site, and the cable is processed according to specific engineering conditions, so it is not interchangeable.

For example:

The number of power distribution floors of a building is 24, each floor has one branch, and the trunk line is divided into three circuits (each circuit has 8 floors for power distribution, with a current of 315A); One cable is separated from each floor, and the calculated current is 40A, so the branch cable configuration is as follows:

1. Select three 8-branch cables;

2. The specification of trunk cable is YJV-4 * 185+1 * 95, the specification of branch cable is YJV-5 * 16, and the branching length is 2m;

3. The standard floor height is 3m, and the length from the distribution room to the first distribution floor is 80m;

4. (3 feeder cables * 80m), 3 finished pre branch cables * 25m, branch spacing 3m, and 3 cable transition boxes.

Chongqing Lizhi Electric Co., Ltd

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