In practice, cable tray dimensions are a system of interrelated measurements —width, depth, length, and material thickness—that directly affect cable fill compliance, heat dissipation, structural loading, and long-term expandability. The sliding cover allows quick access and prevents contents from mixing. Equipped with insulated wire end ferrules (DIN 46228 Part 4). According to colour series II (ZF). Aplus. Categories: Cable Trays, Cable baskets & Trunking, Electrical Products. Brownrig Supplies Direct are one of the leading suppliers of mechanical and electrical products, providing a dedicated service to trade & industry. (Left/Right) Black 45U Vertical Cable Management, 1Set = 2 Pcs. Content may not be reproduced without prior consent.