Generally, supports should be spaced 1. Do I need to bond the sections for earthing purposes? Yes. For safety and compliance, bonding the sections is essential, especially in electrical cable. Although BS 7671 touches on the subject of cable supports, it does not detail specifically what these support distances should be. 8 (Other Mechanical Stresses (AJ)) in that document provides requirements for cable support. Clause 522-08-04 Where conductors or cables are not supported. The primary rulebook used in the safe use of cable trays is NEC Article 392. This is a description of how to select, install, and support these metal or plastic frames, on which electrical wires are installed. Cable ladder systems and cable tray systems shall be manufactured in accordance with BS EN 61537, channel support. The distance between trays affects not only the ease of maintenance but also cable protection, heat dissipation, and system stability.
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