The minimum bend radius for horizontal cables will vary depending on the condition of the cable during installation (tensile load) and after installation when the cable is at rest (no-load).

Requirements

• The minimum bend radius, under no-load conditions, for 4-pair UTP cable shall not be less than four times the cable diameter and the minimum bend radius of 4-pair ScTP cable, under no-load conditions, shall be eight times the cable diameter.

Minimum backbone cable bend radius

Requirements

• The minimum bend radius, under no-load conditions, for multipair backbone cable shall be ten times the cable diameter.

Minimum patch cable bend radius

Requirements

• The minimum bend radius, under no load conditions, for 4-pair ScTP patch cable shall be eight times the cable diameter.

NOTE - Minimum bend radius conditions and cables not specified under subclause 10.2.1 (i.e., Category 6) are under further study.

Maximum pulling tension

Requirements

• The maximum pulling tension of 4-pair 24 AWG UTP cable shall be 110 N (25 lbf). 
• For multipair backbone cable, manufacturer's pulling tension guidelines shall be followed.