Sometimes companies does not provides fittings, that situation electricians used to cut a trays with using jigsaw machine.įittings: T-Joint, bend or elbows, crossover, inside riser, outside riser, reducer, coupler, joint plate, unistate, spring and nut bolts. There are various types of fittings used in the manual tray installation. Punching or perforated cable tray is used to lay of the control cables. 100 mm, 150 mm, 300 mm, 450 mm, 600 mm, 750 mm and 900 mm are the available sizes of ladder trays. Ladder tray is used to lay the power cables. Interview tip: here you can read about electrical cable glands and its types and sizes. Purpose of using – Cable support and laying. 150 mm and 300 mm sizes of ladder is mostly used in the electrical construction. Ladder is mainly used to lay the power cables. There are two types of trays are used in the electrical construction.
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