Cable tray clamp specifications and dimensions
Cable tray clamps are designed to securely attach conduits or cable trays to structural supports, with specifications varying by type, material, load capacity, and mounting configuration.
Types and Applications
Cable tray clamps are used to secure conduits or cables exiting from cable trays and to provide mechanical support and grounding continuity. Common types include:
- LCC Series (Crouse-Hinds): Designed for inside or outside flange mounting on cable trays, accommodating rigid steel, aluminum, IMC, and EMT conduits. LCCF clamps are specifically for inside flange use .
- Wide-Flanged Clamps (MP Husky): Suitable for beams 6"–12" wide and up to 3/4" thick, with maximum allowable loads ranging from 300 lbs to 1,275 lbs depending on the model .
Materials and Construction
- Body: Cast iron (electrogalvanized) or steel (zinc-plated) for strength and corrosion resistance .
- Hook/Set Screws: Steel, sometimes with vinyl caps for protection .
- Finish: Electrogalvanized, zinc-plated, or painted for indoor/outdoor durability .
Dimensions and Compatibility
- Conduit Sizes: LCC clamps accommodate 1/2" to 4" conduits, while LCCF clamps fit 3/4" to 1-3/4" wide flanges .
- Beam/Flange Widths: MP Husky clamps fit beams 6"–12" wide, channel clamps for flanges up to 3-1/4" wide .
- Profile: Compact, low-profile design minimizes tray space usage .
- Adjustability: Many clamps feature adjustable hooks or swivel joints to fit various tray angles and flange thicknesses without drilling or welding .
Load Capacity
- Standard Clamps: 300–500 lbs for typical channel or beam clamps .
- Heavy-Duty Clamps: Up to 1,275 lbs for HP single or back-to-back strut support channels .
Installation Features
- Quick Installation: Tighten clamp nut or set screws; no disassembly required for conduit attachment .
- Swivel Hooks: Allow conduit to be clamped at any angle relative to the tray, facilitating wire pulling and minimizing bending .
- Grounding: Provides superior electrical continuity between conduit and tray .
- Indoor/Outdoor Use: Suitable for various environments, including industrial and commercial applications .
Standards and Compliance
- Clamps are designed to meet UL, NEMA, and CE standards depending on manufacturer and region .
- Material selection and finish are chosen based on environmental conditions to prevent corrosion and maintain mechanical integrity . In summary, cable tray clamps vary by type, material, load rating, and mounting configuration, with dimensions tailored to conduit size, tray flange width, and structural support. Proper selection ensures mechanical stability, electrical grounding, and safe cable management in both indoor and outdoor installations.
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