When laying cable is a reasonable solution would be to use a cable tray. It will fix and protect one or more cables, as well as facilitate further installation and maintenance work. Widely used in the laying of electrical wiring, computer and telecommunications systems.
The presence of such mounting hardware meets the necessary requirements of reliability and safety in the construction and repair of industrial and residential buildings. All builders, creating projects where a large number of wires are used, resort to these special means.
Types and sizes of metal cable trays
In the market of construction materials are widely represented cable trays metal and plastic. Products made of metal are especially popular because they are durable and resistant to various influences. When selecting protection for the cable, it is necessary to consider the number and size of the cable line, the total weight and the intended location of the installation.
Metal cable routing tray made of thin galvanized steel has positive characteristics. It does not corrode, is resistant to stress and has a long service life. Galvanized version makes it possible to lay wiring both inside and outside the building. Its price is relatively low compared to similar products of stainless steel.
Depending on the features of the construction use the following cable tray: perforated and non-perforated, wire and ladder tray. In addition to the above-mentioned characteristics, a tray with a cover may be included if the conditions of use require it.
For particularly harsh conditions, trays made of stainless steel are used. Despite a number of advantages, these products have a high price and considerable construction weight.
Plastic analogues are quite fragile, which makes their application limited.
Cable tray metal is on the market a wide range of sizes.
Features of cable trays installation
To define the construction and the size you need to think about: communications inside or outside, amount and supposed total weight of cables and wires, possible unfavorable mechanical and other effects, unauthorized access, peculiarities of installation place. Accessories, brackets, fasteners by means of a rack shall be taken into account in advance.
When protecting the wires and cables follow the following rules: total voltage must not exceed 1000 V, the occupancy of the cable tray can not exceed 50%, the number of wires and cables in one bundle shall not exceed 12. According to the documents regulating electrical installation work, these special means must have grounding.
During installation, the metal perforated wire tray may need to be connected. For this purpose joint sections, screws are used, or sections can go one inside the other. This technical point is taken into account at an early stage, since the fasteners are supplied with the main product
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