When laying the cable, it is a smart decision to use a cable tray. It will allow you to fix and protect one or more cables, as well as facilitate further installation and maintenance work. It is widely used in the laying of electrical wiring, computer and telecommunication systems.
The presence of such mounting devices meets the necessary requirements for reliability and safety in the construction and repair of industrial and residential buildings. All builders, creating projects that use a large number of wires, resort to these special tools.
Types and sizes of metal cable trays
Metal and plastic cable trays are widely represented on the building materials market. Metal products are especially popular, as they are durable and resistant to various influences. When choosing protection for a cable, it is necessary to take into account the number and size of the cable route, the total weight and the intended installation location.
The metal cable tray, made of thin galvanized steel, has positive characteristics. It does not give in to corrosion, is steady against loadings and has long service life. The galvanized version makes it possible to lay wiring both inside and outside the building. Its price is relatively low compared to similar stainless steel products.
Depending on the features during construction, the following cable tray is used: perforated and non-perforated, wire and ladder. In addition to the above characteristics, the kit may include a tray with a lid, if required by the operating conditions.
For particularly difficult conditions, trays made of stainless steel are used. Despite a number of available advantages, these products are distinguished by a high price and considerable weight of the structure.
Analogues made of plastic are quite fragile, which makes their use limited.
Metal cable tray is available on the market in a wide range of sizes.
Features of mounting trays
To determine the choice of design and size, it is necessary to consider the following: communications will be laid inside or outside, the number and estimated total weight of cables and wires, possible adverse mechanical and other effects, the presence of unauthorized access, features of the installation site. Components, brackets, rack mounts are taken into account in advance.
When protecting wires and cables, the following rules should be observed: the total voltage should not exceed 1000 V, the cable tray occupancy should not exceed 50%, the number of wires and cables in one bundle should not exceed 12. According to the documents regulating electrical installation work, these special tools must be grounded.
During installation, the perforated metal cable tray may need to be connected. For these purposes, butt sections, screws are used, or sections can go into one another. This technical point is taken into account at an early stage, since fasteners are supplied with the main product.
Similar articles:
