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Cables must not occupy more than 40 of the cable tray
Fill Limits: For power cables, the fill must not exceed 40% of the tray's cross-sectional area; for control cables, it's 50%. Prohibited Areas: Cable trays cannot be used in hoistways or enclosed spaces and must remain accessible. Fill Rules for Multiconductor Cables 3. Why 50% and not 100%? If you were to look at a.