Installation Manual
H3C S7500E Series Ethernet Switches
Chapter 3 Hardware Installation
3-18
equipment room (whether the signal cable of the room is accessed from the cabling
rack on the top of the chassis or the cabling rack under the floor.) Collect all the transit
data signal cable connectors and locate them on the floor of the chassis (instead of any
places outside the chassis for fear of unexpected damage). The power cables run out
of the front right side of the chassis and either on the cabling rack or in the raised floor
as near as possible according to the situation in an exchange equipment room
(concerning DC power distribution cabinet, lightning protection box, terminal strip and
so on).
3.8.3 General Cabling Requirements
I. Minimum curvature radius of cables
z
The curvature radius of a fixed power cable, communication cable, or ribbon cable
should be at least five times the cable’s outer diameter. If the cable is frequently
bent, plugged and unplugged, the curvature radius should be at least seven times
the cable’s outer diameter.
z
The curvature radius of an ordinary fixed coaxial cable should be at least seven
times of the cable’s outer diameter. If the coaxial cable is frequently bent, plugged
and unplugged, the curvature radius should be at least ten times the cable’s outer
diameter.
II. Minimum curvature radius of fibers
z
When the fiber is wrapped up around the cabling plate, the diameter of the cabling
plate should be at least 25 times the fiber’s diameter.
z
When the fiber is being moved, the diameter of the cabling plate should be at least
20 times the fiber’s diameter.
z
When the fiber is fixed, the diameter of the cabling plate should be at least 10
times the fiber’s diameter.
Note:
The fiber’s diameter refers to the outer diameter of the fiber jacket. Generally, the
diameter of a single-core fiber is 0.9 mm, 2.0 mm, or 3.0 mm (0.04 in., 0.08 in., or 0.12
in.).
3.9 Cable Binding
3.9.1 Correct Use of Labels
Correctly edit the label and paste it to the right place of the bound cables. For details,
refer to the description of label usage in the appendix.