This article provides a comprehensive framework that governs various aspects of cable tray installations, including the types of cables that are deemed acceptable for use, requirements for grounding and bonding, and stipulations regarding tray fill capacity. This guide covers the critical steps, from selecting the right electrical cable tray and performing accurate cable fill. The use and installation of cable trays is covered by legally enforceable OSHA regulations in 29 CFR 1910. 305(a)(3), or comparable standards promulgated by States operating OSHA-approved State plans. Here's what you need to know: Cable Types: Only use.