Choose appropriate fire protection materials, such as fire-rated board, firestop packs, firestop mastic, or fire-resistant mineral wool. Firestop packs should be placed in an orderly sequence. The selection of material and finish is a function of the environment in wh tant in a wide range of environments, and easily formable (Appendices II and III). Aluminum's exceptional corrosion resistance, particularly. This standard outlines the construction requirements, testing methods, and performance parameters for cable trays and related support systems. The content is written to be SEO-friendly and compatible with Yoast SEO for WordPress. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned in this technical guide only apply to our own cable management ranges and cannot under any circumstances be transposed to si osure, overheating or. Scope: Firestopping for busway, cable trays, cables, and trunking passing through walls in enclosed electrical installations. Where cables pass through shafts, walls, slabs, or enter electrical panels or cabinets, openings shall be tightly sealed with firestopping materials in accordance with. The primary rulebook used in the safe use of cable trays is NEC Article 392.