What is the appropriate height for laying cable trays
Clearances: Maintain at least 12 inches of vertical clearance above trays for installation and maintenance access (2026 NEC update). The choice depends on the application, cable types, and environmental conditions. Ladder trays, with their two side rails connected by rungs, are the most common type. When installing two cable trays in parallel at the same height, the distance between them should be no less than 0. These systems, made from metal or plastic, are open structures designed to support electrical conductors, ensuring proper organization and safety. 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.
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