Cable Routing - Siemens SIMATIC TI500 User Manual

Network Media Installation — Local Line (continued)

Cable Routing

CAUTION
!
2-10 Network Installation
Cable routing should be planned as if the path between all stations on the
network were free of obstructions. The next step is to modify the first
routing to account for obstructions, then calculate the amount of cable
needed.
Observe all local and national electrical and fire codes when
installing wiring.
In general, there are three types of network cabling routes:
Under-floor
In-ceiling
Surface ducting
Any combination of these three routes may be used on a single network. The
choice is often determined by whether or not the building (or buildings) in
which the network is being installed is new construction or an existing
building. The following paragraphs describe some of the advantages and
disadvantages of each type of cable routing.
Under-floor — For under-floor routing, the cable can be enclosed within
ducts or, with raised flooring, in the "open air." Under-floor systems enclosed
in ducts are usually expensive, and while they are better-protected against
unauthorized taps than are open-air systems, they often make future
expansion of the network more difficult and expensive.
Open-air under-floor cabling systems usually provide good access, and allow
maximum network expansion and flexibility.
In-ceiling — For in-ceiling routing, network cables are usually supported
in troughs or with hooks and clamps every 10 or 15 feet. Some advantages
of in-ceiling installation are the following.
Flexibility
Low-cost installation
Accessibility to cabling
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