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How long should the cable be reserved at the terminal and intermediate joints
2024-09-27
Cable terminal about cable reservation
1.2.5% of cable laying sag, waveform camber and cross allowance shall be calculated according to the total cable length
2. When the cable enters the building, the specification stipulates that the minimum value is 2.0m
3. When the cable enters the trench or the hanger, it is reserved up (down), and the specification stipulates that the minimum value is 1.5m.
4, substation incoming line, outgoing line, specification * small value 1.5m
5. Maintenance allowance of power cable terminal head * small value 1.5m
6. Maintenance allowance * minimum value 2.0m shall be reserved at both ends of cable intermediate connector box
7, cable into the control, protection screen and analog disk, etc. reserved, according to the disk size height + width
8.2.0m allowance for incoming and outgoing lines under high-voltage switchgear, low-voltage distribution board and box board
9. Cable to motor allowance, 0.5m from motor junction box
10. Factory transformer allowance, 3.0m from the floor
11. The increased length of cables bypassing beams and columns shall be calculated according to the actual situation. If the length is calculated according to the section of the object to be wound, the increased length shall be calculated
12. For each fixed point of elevator cable and cable rack, the specification * minimum value is 0.5m
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