WireRun® Cobia® Galvanized Mesh Cable Trays are one option. Sound complicated? It isn't, if you're using products that fulfill both structural and grounding requirements. KEEPING YOUR CABLE TRAY INSTALLATION ON THE RIGHT PATH You need to instead add on fittings that not only allow for the directional change, but also maintain the cable tray's structural integrity and grounding path. Just as with UL's requirements, this means you can't change the path of a cable tray by removing parts (like rungs) and bending. And because electrical inspectors who inspect and give your installation the final thumbs-up rely on UL to cover liability for the installed products, any modification violating UL regulations can result in an automatic failure during inspection.įurther, NEC article 392.5(E) specifies that proper fittings must be used whenever cable trays change direction or elevation. Why the sudden change? For starters, UL does not stand behind field modified parts, because they have no way of verifying or guaranteeing their safety post-modification. It doesn't matter if your cable tray system was UL classified or NEC compliant when it left the factory - as soon as it is field modified, it automatically loses its code-compliant status.
