About Bashir Ahmad
Cable Tray:
Cable
tray is a hanging structure which is fabricated in different metals to fix all
types of cables wiring/control cables in industry. It is the mechanical
solution for hanging & laying the cables and provides protection against
all environmental effects and technical contingencies.
Classification,
Design and accessories of Cable Tray:
Cable
tray can be fabricated and design according to industrial usage and plant
specifications; it could be in following types;
Ladder Cable tray:
A stair type ladder tray consists of Rungs which is joint by two sheet
walls. It has relevantly less weight.
Perforated Cable tray:
Design, bend and fabricated a one
piece of material and perforated by punches. It has high weight as compared to
Ladder cable Tray.
Other types of cable tray are duct and cable tray Mesh type.
Cable
tray is fabricated by difference types of material like, SS Steel, Aluminium,
MS Steel and HR Steel. The choice and selection of material solely depend on
characteristics of environment and atmosphere of installed area.
Cable tray is coated by Hot Dip
Galvanized o r powder coated procedure to protect against rust and other
environment effect. Cable tray as a set consists of different accessories like
Joint plates, Nut Bolts, Bends, Tee, Risers, Vertical and horizontal bends,
Cable tray supports, Rods and brackets. These accessories are helpful in complete
installation of cable tray.
Industrial Usage of Cable Tray:
The
basic purpose of cable tray is to protect electrical cables such as mechanical
protection, ventilation and separation of electrical cable wiring system from
other utilities and property & plant fixtures, laying and distribution of
cables in premises, factory o r plants. It is designed by viewing the installed
area environment and temperature. Technically speaking it is also used as a
separator between different voltage level to protect the interferences for
control and power cables.
Precautions and instruction in Manufacturing and installation process:
Cable tray installation is the
important segment of Electrical installation. So expert manufacturing team must
visit site before start making cable tray to ensure that the design and
specification; The material used in fabrication is according to site
atmosphere, material gauge strength is so enough that carry the weight of
cables laying. Whether Hot dipped galvanized and powder coating process is
necessary for cable tray to protect against rusted
conditions.
There
must be extra care in making and installing cable tray that there are no sharp
edges and cuts. These can be harmful for cable laying. Proper and accurate
perforation of cable tray is helpful to absorb heating effect and give
ventilation to cable. All accessories like joint plates, riser radius, earth
jumpers, and cantilever should be installed in a way that it strengthens the
cable tray structure to carry the weight of cables. In order to secure the
installation cable tray structure must be grounded from both
ends.
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