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In the electrical wiring of buildings, a cable tray system is used to support insulated electrical cables used for power distribution and communication. cable trays are used as an alternatives to open wiring or electrical conduit systems, and are commonly used for cable managment in commercial and industerial construction. they are especially usefull in situation 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
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