Do cable trays need vertical supports

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The 2026 NEC introduced an important update: cable trays must have at least 12 inches of clear vertical space above them to allow for installation and maintenance access. This publication is intended as a practical guide for the proper and safe* installation of cable ladder systems, cable tray systems, channel support systems and associated supports. The National Electrical Code is a set of principles designed to promote public safety and welfare, as well as safeguard public health by regulating the design and operation of electrical facilities and. Proper installation can significantly reduce electromagnetic interference, prevent fire hazards, and improve overall efficiency. In vertical trays, cables shall also be secured at intermediate locations as necessary to keep all cables completely within and secured to the tray.

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