As with any electrical equipment, cable trays and the wiring contained in the trays must be listed, labeled or otherwise approved, pursuant to the requirements of 29 CFR § 1910. Recognize electrical cable tray misuse that can lead to electric shock and arc-flash/blast events and fires caused by overheating. 305(a)(3), or comparable standards promulgated by States. 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. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. When properly selected and installed, cable trays simplify routing, improve accessibility, and support future expansion while. (i) Metal raceways, cable trays, cable armor, cable sheath, enclosures, frames, fittings, and other metal noncurrent-carrying parts that are to serve as grounding conductors, with or without the use of supplementary equipment grounding conductors, shall be effectively bonded where necessary to.
