![]() When fixing cables to exposed horizontal surfaces, the spacing of metal fixings should be approximately every 300mm. Metallic fixing must also be used to reduce the risk of cable fixings failing and causing obstruction. The 18 th Edition also explicitly states that plastic clips cannot be used as the sole or “main” method of support for cables in entry and exit routes. What does this mean? It means that not only escape routes must be well protected, but also any entry routes into the building. In the 18 th Edition, this terminology was changed to state that additional support is required in “access or egress routes”. In previous regulations, the requirement for additional support of wiring systems was stated only to be necessary in “escape routes”. What are the requirements of the 18 th Edition for cable fixing? 1 – Locations where additional cable support is required Here is a summary of what changed and what it means for the fixing of cable and wiring systems. ![]() The 18 th Edition of the IET Wiring Regulations (BS 7671) came into effect in January 2019.
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