Required Tray Width = (Total Cable Cross-Sectional Area ÷ Fill Ratio) ÷ Tray Height Where: Project: Industrial control system with 20 power cables and 35 control cables Given: Calculation: Recommendation: Use 150mm or 200mm cable tray to allow 25% future expansion. 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. It also demonstrates how Eaton's solutions and services can help: As an industry leader in cable tray, Eaton offers one of the widest ranges of. us-trations without notice. Minimum Requirements for Barriers (NEC 392. 6) Cable trays are components of the systems that support the cables and wires that supply electricity and communications.
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