C-Channels, Box Channel, Steel C Channel, Aluminum, and Stainless
Since 1948, Johnson Brothers has manufactured Metal channels including C Channels & Box Channels. We also specialize in Open
Fixed distribution box on channel steel
A metal distribution box can be securely mounted on channel steel using appropriate brackets, fasteners, and DIN-rail or surface-mount configurations.
Choosing the Right Channel Steel
Channel steel, often supplied as Unistrut or compatible struts, comes in various sizes such as 41 x 21mm, 41 x 41mm, 41 x 62mm, and 41 x 83mm, with plain or slotted profiles for easier fixing . For heavier distribution boxes, heavier-duty box sections or back-to-back channel arrangements provide additional support . Channels are available in pre-galvanised, hot-dip galvanised, or stainless steel, which is important for corrosion resistance depending on indoor or outdoor installation .
Selecting the Distribution Box
Metal distribution boxes, like the MDC series, are made from high-quality steel sheet with a matt-finish polyester powder coating . They are designed for DIN-rail mounting or surface mounting, with knockouts on the top, bottom, and back for cable entry . Ensure the box size and weight are compatible with the chosen channel steel.
Mounting Techniques
- DIN-Rail Mounting:
- If the distribution box supports DIN-rails, attach a DIN-rail to the channel steel using channel brackets or clamps.
- Snap the distribution box onto the DIN-rail, ensuring it is level and secure .
- Direct Surface Mounting:
- Use U-bolts, channel nuts, or threaded fasteners to attach the box directly to the channel steel.
- Align the box so that knockouts are accessible for wiring.
- For heavier boxes, consider back-to-back channels or additional support brackets to distribute the load .
- Spacing and Alignment:
- Maintain proper spacing between the channel and the box to allow ventilation and heat dissipation.
- Ensure the box is plumb and level to prevent strain on cables and connectors .
Additional Considerations
- Corrosion Protection: Use galvanized or stainless steel channels in humid or outdoor environments .
- Cable Management: Plan for cable entry and routing through knockouts or conduit clamps.
- Safety Compliance: Ensure installation meets local electrical codes and voltage ratings (e.g., 230/415V for MDC boxes), . By combining the right channel steel profile, mounting hardware, and distribution box type, you can achieve a secure, durable, and code-compliant installation.
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