Example: Stainless steel covers meet NEC 392. 10 (B) corrosion resistance requirements for wet locations. PVC Covers: Ideal for telecom tunnels (UL 94V-0 flame rating) Fiberglass (FRP): 40% lighter than steel, used in oil refineries per API RP 540Cable tray covers are protective enclosures that shield cables from environmental hazards while ensuring compliance with safety standards like NEC 392. Covers are fabricated. Discover cable trench cover plates with impact-resistant composite resin & fiberglass. This document contains proprietary information developed by and for exclusive use of Saudi Electricity Company (SEC) Distribution Network.