When it comes to how much spacing there should be between brackets, the general rule of thumb is every 300mm to 400mm for horizontal runs, and 500mm to 600mm for vertical runs, but this depends on the type and weight of the cable. A cable support system consists of cable support lengths and system components, such as cable support fittings, support elements, mounting elements and system acces-sories. The cable support lengths and fittings can basically be designed as cable trays, cable ladders or mesh cable trays, in which. This publication is intended as a practical guide for the proper and safe* installation of cable ladder systems, cable tray systems, channel support systems and associated supports. Cable ladder systems and cable tray systems shall be manufactured in accordance with BS EN 61537, channel support. Understanding cable tray spacing is key to meeting safety regulations and maintaining system performance. 8 (Other Mechanical Stresses (AJ)) in that document provides requirements for cable support. Clause 522-08-04 Where conductors or cables are not supported. One common question that arises during such installations is whether brackets need to be spaced at intervals as close as every 1 meter along the cable tray or if spacing can be increased without compromising safety and integrity.