GI perforated cable trays GI Raceways GI Ladder type cables trays dealers distributors wholesalers in chickpet Bangalore Karnataka India Cable trays can be used in commercial and industrial buildings Firestopped cable tray penetration with teck cables Fire test in Sweden, showing rapid fire spread through burning of cable jackets from one cable tray to another Cable spreading room at Point Tupper In the electrical wiring of buildings, a cable tray system is used to support insulated electrical cables used for power distribution, control, and communication. Cable trays are used as an alternative to open wiring or electrical conduit systems, and are commonly used for cable management in commercial and industrial construction. They are especially useful in situations where changes to a wiring system are anticipated, since new cables can be installed by laying them in the tray, instead of pulling them through a pipe. According to the National Electrical Code (NEC), a cable tray is a unit or assembly of units or sections and associated fittings forming a rigid structural system used to securely fasten or support cables and raceways