Conduit
The simplest form of cable protection is a metal or plastic conduit to protect the cable as it travels
through walls and ceilings. Conduit is really nothing more than a thin-walled plastic or
metal pipe. Conduit is used in many commercial installations to contain electrical wires. When
electricians run conduit for electrical installation in a new building, they can also run additional
conduit for network wiring. Conduit is put in place, and the individual cables are run inside it.
The main advantage to conduit is that it is the simplest and most robust protection for a network
cable. Also, if you use plastic conduit, it can be a relatively cheap solution (metal conduit
is more expensive).
Cable Trays
When running cable, the cable must be supported every 48 to 60 inches when hanging horizontally.
Supporting the cable prevents it from sagging and putting stress on the conductors
inside. For this reason, special devices known as cable trays (also sometimes called ladder racks,
because of their appearance) are installed in ceilings. The horizontal cables from the telecommunications
rooms that run to the individual telecommunications outlets are usually placed
into this tray to support them as they run horizontally.
Thursday, October 21, 2010
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