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9.2 Network Wiring
See section 3.2, "Network Wiring Equipment," for details on the equipment that makes up the
network. This section presents an outline of the wiring laid inside the control panel and outside the
control panel. This section also presents individual notes on the twisted pair cables used, the
coaxial cables, the AUI cables, and the MAUs.
Basic points in laying out a network
CAUTION
1. When laying network cable, take adequate safety measures and perform all operations in
accordance with the relevant standards. See the ISO/IEC8802-3 standard for details on laying
networks.
2. We strongly recommend hiring a qualified contractor who has specialized knowledge about safety
precautions and standards.
3. Avoid installing 10BASE5, 10BASE2 or 10BASE-T networks in environments that have high noise
levels. If this is unavoidable, adopt the noise prevention measure described below.

1. Overview of wiring outside the control panel

a. Layout environment and required work
Lay out cables in a manner appropriate for the environment. The steps listed in the following table
are generally required.
Table 9.1 Wiring Environment and Work Operations
Environment in which cable is laid Work operations
Major categories Minor categories
Locations where cables will
not be damaged Installation without protective pipes
Installation with protective pipes
Location where cables could
be damaged
Places where there is normally motion
of people and objects Installation with protective pipes
Places where cables may be influenced
by humidity, chemicals, oils, or heat Installation with protective metal pipes
Places where cables may be damaged
by rats, mice, or other animals. Installation with protective pipes
Places where cables may receive
strong mechanical shocks, or where
heavy physical loads may be placed on
the cables.
Installation with protective metal pipes
Locations where there is a
likelihood of electromagnetic
interference
Protective installation and separation
of cables.
Installation with protective metal pipes
The term "installation with protective pipes" means that either metal or PVC pipes may be used.