Why should the cable be reserved for length?

Because the cable laying adopts bright application, bridge frame, direct burying, cable trench, pipe piercing and so on, it is very difficult to maintain and replace the cable, especially after the middle section has problems, the maintenance is more difficult. So it needs to be reserved for cable laying.

Not only reserved in the cable trench of the feeder cabinet, but also reserved at the end; if it is pipe-piercing or cable trench laying, a certain length should well should also be reserved for a certain length.

Benefits of end-to-end reservation:

When the power cable is connected to the feeder circuit or equipment, it needs to press the copper nose and the outer protective layer of the cable also needs to be removed. Generally, it is easy to have problems in the exposed live part of the cable at the end of the cable; And distribution cabinets, control cabinets and other problems themselves are easy to spread to the cable, so in the end of the cable need to reserve a certain length to deal with subsequent maintenance. Otherwise, it will be difficult to deal with the problem in the figure below.

Benefits of well reservation:

It is necessary to set up a repair well at a certain distance when is dark, which is mainly used to check and repair the faults in the middle section of the cable. If a section is damaged by external force or problems, the quantity reserved in the repair well can be used nearby, which makes the maintenance convenient and time-saving. Otherwise, it is difficult to deal with the following problem.

Other benefits:

Because the laying path of general cable is generally more complex, it is often necessary to turn and bend, the length of the cable can not be calculated accurately, and the appropriate reserved length can also deal with all kinds of special when laying.