1. When the crane uses a suspended cable trolley (or cable guide), the cable should be prevented from being worn and excessively bent during movement. For cables, the curvature diameter of the cable suspension bending plate should be at least 6.3 times the outer diameter of the cable; for cables with an outer diameter greater than 8mm, it should be at least 8 times the outer diameter; for cables with an outer diameter greater than 12.5mm, at least the outer diameter should be 10 times the diameter; for flat cables, the thickness of the cable is equivalent to the diameter of a round cable.

When gantry crane cables are arranged, ensure that the length of each cable is equal, the pressure plate is crimped firmly, the outer diameter of the same layer of cable is as close as possible, and it is necessary to avoid excessive stress on one or a few cables. Suspension cable trolleys should be provided with traction wire ropes between each other. During operation, when the distance between two adjacent suspension cable trolleys makes the angle between the suspension cables close to 120°, the traction wire ropes should be completely straightened and stressed.

2. When using a cable reel for power supply, the cable should be prevented from being worn during movement. For cables with an outer diameter not greater than 21.5mm, the bottom diameter of the cable reel should be at least 10 times the outer diameter of the cable; for cables with an outer diameter greater than 21.5 mm mm cable, the bottom diameter of the cable reel should be at least 12.5 times the outer diameter of the cable.

The cable reel of bridge crane should be able to automatically wind the cable, and the driving torque of the cable reel should not be less than the maximum winding torque required for winding the cable. During the unwinding process, the traction force acting on the cable conductors should be as small as possible. For cables without reinforcing cores, the maximum allowable pulling force acting on the copper conductor cross-section is 20N/mm2. For cables requiring high winding speed or cable dead weight When it is heavier, a reinforced steel wire rope that can withstand the required traction force should be added as a core.