Cable trays and raceways are simple yet effective tools for organizing and hiding cables. These systems attach to the underside of your desk or along walls, neatly containing wires. You can hide everything from power cords to HDMI cables inside these channels, making them invisible. This guide provides step-by-step instructions on installing a cable tray on a wall, covering different types of cable trays, tools needed, and safety tips. The guide includes diagrams for mounting cable trays on walls using pre-fabricated flanges or channels, laying cables, and selecting the. Cable trays are one of the most versatile and widely used solutions among all types of cable containment systems. 6 of BS 7671:2018+A2:2022 (IET Wiring Regulations 18th Edition).