Cable Tray Bend Radius: Choosing Fittings for Your Cables
Choose cable tray fitting radius using cable bending requirements and available space. Understand width, angle, radius and installation constraints.
Tray width, side height and turning angle do not fully specify a cable tray bend. The fitting radius also needs to suit the cables and the available installation space.
Distinguish the dimensions
Width describes the cable pathway size. Angle describes the change in direction. Radius describes the curvature using the reference shown on the fitting drawing. Confirm whether that reference is an inside radius, centreline or another defined dimension.
Follow cable requirements
Check the cable manufacturer’s minimum bending radius and any distinction between pulling, installation and final-position conditions. Also review the pulling and handling plan. There is no single diameter multiplier suitable for every cable.
For an illustrative cable only, if its documented requirement for a particular condition is 12 times a 30 mm outside diameter, the result is 360 mm. This is not a universal factor or an automatic fitting approval. Verify the cable’s actual route through the selected fitting.
Eaton’s cable tray manual recommends choosing fittings that meet cable bending requirements and facilitate installation.
Coordinate the complete bend
Check space, cable arrangement, supports, joints, covers, dividers and access. For vertical bends, provide drawings that make the required direction unambiguous.
Include system type, width, height, thickness, material, finish, angle, radius reference, direction and quantities in the enquiry. Read the accessories guide and send drawings to Rovana Trade for an itemised supply quotation.
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