For cabinet installations, pre-reserved cable lengths typically range from 1 to 1.5 meters for movable cabinets, with optical cables reserved at 3–5 meters, while fixed cabinets generally have no reserved length inside the cabinet.

General Guidelines

• Fixed Cabinets: No cable length is reserved inside the cabinet; all slack should be in a concealed area outside the cabinet, typically between 1m and 1.5m .
• Movable Cabinets: Cables entering the cabinet should have at least 1 meter of reserved length at the entrance, and the difference in reserved lengths between various cables should not exceed 0.5 meters .

Optical Cables

• Optical cables should be coiled and reserved for a length of 3–5 meters to allow for maintenance or future reconfiguration .

Power and Signal Cables

• Measure the distance between the power distribution frame and the cabinet terminals, and reserve a proper length to avoid connectors or solder joints in the middle of the cable .
• Power cables should be routed straight with smooth curves, maintaining a minimum bending radius of three times the cable diameter .
• Power and signal cables should be separated, with at least 100 mm distance when routed in parallel .

Practical Tips

• Leave slack or service loops under wireways or trays to facilitate future expansion or rearrangement .
• Ensure that cables of different voltage levels or current categories are arranged separately to prevent interference .
• After termination, verify cable identification and affix labels to indicate room and port numbers for easy maintenance .

Summary

• Movable cabinets: 1–1.5 m reserved, optical 3–5 m
• Fixed cabinets: no internal reservation, slack outside
• Power cables: measured to terminals, avoid coiling, maintain separation
• Signal cables: routed separately from power, maintain smooth curves Following these guidelines ensures proper installation, reduces stress on cables, and allows for future maintenance or upgrades without reworking the wiring.