CommScope Trunk & Distribution Cable - Manual (Page 17)

Bending Radii
Cables are often routed around corners during cable placement and pulling tension
must be increased to apply adequate force to the cable to bend the cable around the
corner. Tension is directly related to the flexibility of cable - and flexibility is QR’s greatest
strength.
CommScope’s specified minimum
bending radius is the static (unloaded)
bending radius of the cable. This is the
minimum radius to which the cable can
be bent without electrically or mechanically degrading the
performance of the cable. Bending the cable in this manner is
usually only done during splicing or final forming. This is also the
radius allowed for storage purposes.
Always review the specifications for the appropriate
bend radii. If you do not exceed the minimum bend
radius nor exceed the maximum
pulling tension, you should have a
successful installation.
The bending radii of cables during the
construction process are controlled by
construction techniques and equipment.
Corner blocks and set-up chutes have
large radii and low friction surfaces that
minimally contribute to the overall
increase in pulling tension.
QR cable’s
shield
construction
permits the
tightest bend
radius in the
industry
Minimum
Cable Bending Radii
in/cm
QR 320 3 (7.6)
QR 540 4 (10.2)
QR 540 armored 6.5 (16.5)
QR 715 5 (12.7)
QR 715 armored 7.5 (19.1)
QR 860 7 (17.8)
QR 860 armored 9.5 (24.1)
P3 500 standard (jacketed) 6.0 (15.2)
P3 500 bonded (jacketed) 3.5 (8.9)
P3 625 standard (jacketed) 7.0 (17.8)
P3 625 bonded (jacketed) 4.5 (11.4)
P3 750 standard (jacketed) 8.0 (20.3)
P3 750 bonded (jacketed) 6.0 (15.2)
P3 875 standard (jacketed) 9.0 (22.9)
P3 875 bonded (jacketed) 7.0 (17.8)
MO500 6.0 (15.2)
MO650 7.0 (17.8)
MO750 8 (20.3)
Aerial Installation 3.3
Bending Radii