ITWissen.info - Tech know how online

cable tray

Cable trays, also called cable trays, are constructive devices for the accommodation of cables. They are usually constructions that are fixed to the ceiling or floor and are easily accessible. The cable trays consist of a web which is fixed in the ceiling and to which in turn the outriggers are attached.

The brackets are flat shelves on which the cables are placed. To ensure a certain degree of order and to prevent the cables from slipping off the shelves, they are U-shaped and divided by separators. For shielding reasons, metal trays made of U-shaped bent, perforated or unperforated sheet steel are used. If several metal trays are installed one above the other, the various cables for the mains voltage, auxiliary lines and IT networking should be laid on separate steel trays. This avoids crosstalk and electromagnetic interference as far as possible. Metal trays are available in open and closed design. The latter are used where the routing is visible to everyone and freely accessible. For example in underground car parks or airport buildings.

Cable tray, photo: stromerblog.com

Cable tray, photo: stromerblog.com

They thus provide a certain degree of protection against unauthorized access and also have better electromagnetic compatibility (EMC). It should be noted that the tray is grounded.

Cable tray, fastening the metal

Cable tray, fastening the metal

tray Another constructive design is the lattice tube tray. This route has the advantage that the cable routing to cable ducts or to distribution cabinetscan be routed directly through the grids. The tubular grid route offers no protection against electromagnetic interference.

Cable route, fastening and cable routing with the grid tube route

Cable route, fastening and cable routing with the grid tube route

Another type of route construction is carried out using retaining brackets, which are fastened to the ceiling at short intervals and into which the cables are laid. This relatively simple and inexpensive type of routing should only be used in exceptional cases, as it is associated with a number of disadvantages, namely mutual inductive interference.

Informationen zum Artikel
Englisch: cable tray
Updated at: 20.05.2019
#Words: 526
Links:
Translations: DE