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OSHA: Electrical Safety Hazards of Overloading Cable Trays


Fact Sheet

According to the 2005 National Electrical Code® (NEC), a cable tray system is “[a] unit or assembly of units or sections and associated fittings forming a structural system used to securely fasten or support cables and raceways.” Cable trays support cable across open spans in the same manner that roadway bridges support traffic. Cable trays are not raceways, and are treated as a structural component of a facility’s electrical system. Cable trays are a part of a planned cable management system to support, route, protect and provide a pathway for cable systems.


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