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5.1 Trunk Cabling (Twisted-Pair Cable)
5
5.1 Trunk Cabling (Twisted-Pair Cable)
Outside the cubicle means in principle the space from a trunk cable to a relay unit. The
method of installing trunk cables is described here.
5.1.1 Installation environment and applicable work
Installation of trunk cables should be done as appropriate to the environment. General
work details are shown in Table 5-1.
Note: For piping, both metal pipes and hard vinyl pipes may be used.
For work without piping and work with piping, observe the following instructions.
Table 5-1 Cable Installation Environment and Applicable Work
Place (environment) of trunk cabling
Work
Major classification Minor classification
Place free of damage to cables − Work without
piping,Piping
Place harmful to cables Place where people and
objects generally move
Piping
Place where cables may be
adversely affected by
moisture, chemicals, oil,
heat, etc.
Metal piping
Place where cables may be
damaged by rats or other
animals
Piping
Place where cables may be
subject to serious
mechanical shock or
pressure of heavy objects
Metal piping
Place where there is the danger of
trouble by electromagnetic induction
− Separation of cables and
their protection work and
metal piping
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