Standard dimensions of cable tray clamps

Cable tray clamps are available in a wide range of sizes, typically accommodating conduit diameters from 1/2" to 4" and cable tray widths from 15mm to 1000mm depending on type and application.

Standard Conduit Clamp Sizes

Eaton Crouse-

Hinds LCC/LCCF Clamps: Designed for metal conduit (rigid steel, aluminum, IMC, EMT), these clamps accommodate conduit sizes from 1/2" up to 4" and can be mounted on inside or outside tray flanges. Single-line tray cable clamps: Available in sizes such as 1/2" to 1", 2-1/2" to 3", and 3" to 4", typically made of malleable iron with hot-dipped galvanized or cast iron finishes. Flange mount clamps: For outside rail mounting, sizes include 3/4", 1", 3", and 4", providing flexibility for different conduit diameters.

Hold-

Down and Z-Type Clamps for FRP/GRP TraysHold-down clips secure FRP/GRP cable trays to mounting structures and are available for perforated trays from 50mm to 300mm and ladder-type trays from 15mm to 1000mm. These clamps can be used in horizontal, vertical, or transverse installations, and are typically made from stainless steel 304/316 or galvanized steel for durability and corrosion resistance.

Specialized Clamps

Grounding conductor clamps: Sized for 6 AWG to 2/0 AWG grounding wires, often made of copper-free aluminum with electro-tin plating. Swivel or adjustable clamps: Allow conduit to be clamped at any angle relative to the tray, facilitating wire pulling and minimizing bending, with sizes matching standard conduit diameters.

Summary

Cable tray clamps are manufactured to fit a wide range of conduit and tray sizes, from small 1/2" conduits to large 4" conduits, and from narrow 15mm ladder trays to wide 1000mm trays. Selection depends on: Conduit type and diameter (EMT, IMC, rigid steel, aluminum)Tray type and width (perforated, ladder, FRP/GRP)Mounting location (inside flange, outside flange, horizontal/vertical)Material and finish (cast iron, malleable iron, stainless steel, galvanized)This ensures proper mechanical support, grounding continuity, and safe cable routing in both indoor and outdoor installations.