All trays must undergo salt spray tests and coating thickness tests to ensure the coatings meet the durability levels required under the IEC standard for cable tray. Know more about Demand Factor as Per NEC IEC 61537 considers environmental exposure in defining tray performance. Cable tray is the preferred wiring method for industrial facilities, data centers, and large commercial buildings where routing dozens or hundreds of cables through individual conduits would be impractical and expensive. The use and installation of cable trays is covered by legally enforceable OSHA regulations in 29 CFR 1910. One of the most recognized frameworks globally is the IEC standard for. This appendix provides the design criteria for seismic Category I cable trays and their supports. Here is the summary of the main points found in NEC Article. en completely installed, without damage either to conductors or structural system use maintain spacing or to keep cables in place when the tray is ect the minimum bend ra-dius for cables as they exit the bottom of the cable tray. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when.
