March 15, 2021. New energy cable The environment is complex and diverse, such as bridge, direct burial, cable trench, pipe threading, etc., so when laying, operators often reserve a certain length in the planned length. There are many advantages to doing this. On the one hand, in order to facilitate future maintenance, on the other hand, when laying, the environment is complex, and in order to deal with emergencies, the length should also be reserved in advance.
Generally, the reserved length of cable is mostly reserved in the cable trench of feeder cabinet, and the end should also be reserved; In case of laying in pipe or cable trench, a certain length shall be reserved at the place reserved for manhole in the middle.
There are many advantages to reserve the head and tail sections. First, when the wires and cables are connected to the feeder circuit or equipment, the copper nose needs to be crimped and the outer protective layer of the cable needs to be removed. Generally, the exposed live parts at the head and tail ends of the cable are prone to problems; In addition, when the power distribution cabinet and control cabinet itself have problems, it is easy to affect the cable, so a certain length should be reserved at both ends of the cable to cope with subsequent maintenance.
One of the advantages of reservation is that it is convenient for future maintenance. For example, when laying, a manhole will be set nearby, which can be used for cable reservation. When maintenance personnel check and repair in the future, if they find a problem with a section of cable, they can use the cable reserved in the manhole for operation, which is convenient and time-saving.
When there is cable laying. Paths are often extremely complex, so a certain length can be reserved to cope with emergencies. For example, in the actual cable laying, the cable in the tray or bridge is not completely straight, with bending and sag, so these laying allowances need to be considered. In addition, there is still a distance between the cable head and the cable box of the motor. In addition, some cables need to be cut off when making the cable head, so more redundancy should be considered in the cable laying design.
