Cable Tray Systems
Cross-references point to the standards that now own the topic after the October electrical rewrites: MV cable to medium-voltage-cables, energy storage to battery-energy-storage-systems, service grounding to grounding-and-bonding, lightning to lightning-protection.
Showing changes from Rev 3
to Rev 4
in Cable Tray Systems.
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title: Cable Tray Systems
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description: >
When to use: Open-top cable tray systems used as the primary support and management method for electrical power, control, instrumentation, and communications cabling in commercial, institutional, and industrial buildings and process facilities. Covers ladder, ventilated trough, solid-bottom, wire-mesh (cable basket), and channel cable tray; steel, aluminum, and fiberglass (FRP) materials and their finishes; the selection of tray type, material, load/span class, width, and loading depth; fittings, covers, barriers, and dividers; the structural support and bracing of the tray; the grounding and bonding of the tray and its use as an equipment grounding conductor; the calculation of cable fill and the ampacity adjustment of cables in tray; and the testing, inspection, and acceptance of the installed system.
− Not intended for: Conduit, tubing, and raceway systems that enclose conductors (see [[sync/raceways-and-conduit]]); the conductors and cables installed in the tray (see [[sync/conductors-and-cables]]); underfloor raceways and cellular-floor and metal-floor raceway systems; busway and busduct (see [[sync/busway]]); messenger-supported wiring and aerial cable; cable tray in hazardous (classified) locations, which requires application-specific wiring methods beyond the scope of this standard; and the grounding electrode system and service bonding, which are coordinated with but specified in [[sync/grounding-and-bonding]].
+ Not intended for: Conduit, tubing, and raceway systems that enclose conductors (see [[sync/raceways-and-conduit]]); the conductors and cables installed in the tray (see [[sync/conductors-and-cables]] and, for medium-voltage cable, [[sync/medium-voltage-cables]]); underfloor raceways and cellular-floor and metal-floor raceway systems; busway and busduct (see [[sync/busway]] and, above 600 V, [[sync/medium-voltage-bus-duct]]); messenger-supported wiring and aerial cable; hazardous (classified) locations (see [[sync/electrical-hazardous-locations]]); and the grounding electrode system and service bonding, which are coordinated with but specified in [[sync/grounding-and-bonding]].
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## Cable tray is most appropriate where a project routes large quantities of cable along common pathways — equipment rooms, data centers, electrical and telecommunications rooms, process plants, and industrial facilities — and where cables must be added, removed, or re-routed over the life of the facility without opening conduit. {note}
−## Where any portion of the work occurs in a hazardous (classified) location, the Contractor shall notify the Engineer and apply the additional wiring-method requirements of NEC Chapter 5; classified-location cable tray is not within the scope of this standard.
+## Where any portion of the work occurs in a hazardous (classified) location, the Contractor shall notify the Engineer and apply the additional wiring-method requirements of NEC Chapter 5; classified-location cable tray is specified in [[sync/electrical-hazardous-locations]], not in this standard.
# Referenced Standards {toc}
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## Cable tray products that carry a manufacturer warranty against defects shall be warranted to the Owner for the manufacturer's warranty period.