An Installation Pocket Reference Guide.pdf - Anixter
An Installation Pocket Reference Guide.pdf - Anixter
An Installation Pocket Reference Guide.pdf - Anixter
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3. Twisted-Pair Cable|<br />
Bend Radius<br />
It is important not to change the geometry of the cable. Bend radius is the maximum<br />
arc into which a cable can be looped before its data transmission is impaired.<br />
The minimum bend radius for UTP and F/UTP cable is four times the cable<br />
diameter. The bend radius for multipair cable should follow the manufacturer’s<br />
guidelines. The minimum bend radius for cord cable (patch cord) is one times the<br />
cord cable diameter.<br />
When you bend a cable too much, you separate the pairs within the jacketing, which<br />
can result in performance degradation. Cables are manufactured very carefully.<br />
There is a specific twist scheme/pair lay within the jacketing of the cable.<br />
Bending it too much will disturb the benefits of the cable’s manufacturing.<br />
Exceeding the bend radius could kink or crimp the copper, causing signal reflections.<br />
Bend radius 4X cable diameter for UTP and F/UTP cable<br />
X Cable diameter<br />
Figure 3.3 – Minimum Bend Radius UTP and F/UTP Cable<br />
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