Cable Tray: Material Properties
Ventilated cable tray systems are commonly fabricated from a corrosion-resistant metal or from a metal with a corrosion-resistant
Cable tray copper core cable type
Copper core cables for cable trays are typically stranded, insulated, and rated for 600V, with models like Southwire SIMpull THHN/THWN-2 and Service Wire XHHW-2 designed for industrial and commercial applications.
Common Models
- Southwire SIMpull® THHN/THWN-2 Copper Conductors
- Voltage Rating: 600 volts
- Conductor Type: Stranded copper; #8 AWG to 3/0 AWG use unilay soft drawn annealed bare copper, 4/0 AWG and larger use stranded compressed annealed bare copper per ASTM B787/B8
- Insulation: THHN/THWN-2, suitable for conduit and cable trays
- Temperature Ratings: Ampacities based on NEC Table 310.16; 14 AWG: 15A, 12 AWG: 20A, 10 AWG: 30A (NEC 240.4(D))
- Installation: Designed for pull without lubricant, suitable for commercial and industrial feeders and branch circuits
- Service Wire Tray Cable (XHHW-2 / RW90)
- Voltage Rating: Typically 600V
- Conductor Type: Four stranded copper conductors with a bare copper ground
- Insulation: Heat and moisture resistant, chemically crosslinked polyethylene (XHHW-2 or RW90)
- Jacket: Overall black, low smoke, zero halogen, lead-free; binder tape over cable core
- Special Features: Phase-identified, fillers included if necessary, tinned conductor options available
- Applications: Suitable for hazardous locations (Class I Div 2, Class II Div 2), industrial and commercial cable tray installations
- Ampacity: Based on NEC Table 310.15(B)(16), assuming three hot conductors and one neutral
Key Specifications to Consider
- Conductor Material: High-purity copper, stranded for flexibility
- Insulation Type: THHN/THWN-2 or XHHW-2 for heat, moisture, and chemical resistance
- Voltage Rating: 600V standard for commercial and industrial use
- Temperature Rating: Typically 75°C or 90°C depending on insulation type
- Compliance: NEC standards, ASTM specifications, UL listings, and low-smoke zero-halogen (LSZH) options for safety
- Environmental Suitability: Indoor/outdoor, wet/dry locations, and hazardous areas depending on cable type
Cable Tray Considerations
- Tray Type: Ventilated, solid-bottom, or wire mesh depending on heat dissipation and mechanical protection requirements
- Spacing: Maintain proper spacing to avoid overheating; typical rung spacing 150–230 mm
- Bend Radius: Follow manufacturer recommendations to prevent conductor damage
- Material Compatibility: Cable trays may be steel, aluminum, or coated for corrosion resistance; copper cables are compatible with standard trays These specifications ensure that copper core cables installed in cable trays meet electrical, mechanical, and safety requirements for commercial and industrial applications. Proper selection depends on current load, environmental conditions, and compliance with NEC and local codes.
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