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Ethernet cables in metal portioned walls

Stuart Urban

What are people's thoughts on achieving compliance with the below when installing ethernet/structured wiring cables in metal partitioned walls? 

Is ethernet SELV or PELV? If it is can we assume that everything that the structured wiring is used for will be SELV or PELV.

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    So it sounds like your options are either to run it in earthed steel conduit/trunking/ducting or just ignore BS 7671's specific requirements in favour of a 'common sense' approach (a precedent already set by the caravanning fraternity who almost universally ignore BS 7671's demand to use rubber flex for hook-ups, as it's only available in matt black, instead preferring brightly coloured PVC that can be seen by those mowing the grass).

       - Andy.

  • 0 in reply to AJJewsbury
    AJJewsbury said:
    BS 7671's demand to use rubber flex

    Wording in 721.55.2.6 for caravan hookup is different (includes 'or equivalent') to that in 717.52 for mobile & transportable units, which really does 'demand' H07RN-F.

    I guess the 'or equivalent' could be debated until the cows come home - for my money, H05RN-F and H07RN-F are 'general purpose cables' in BS EN 50525-2-21, similarly H05VV-F to BS EN 50525-2-11 are 'ordinary duty cables"  - and in both standards the cables are intended for connection of appliances to a supply by a flexible connection - the difference being that of insulation and sheathing material. (In this case, not water resistance, as that would require H07RN8-F.)

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  • 0 in reply to AJJewsbury
    AJJewsbury said:
    BS 7671's demand to use rubber flex

    Wording in 721.55.2.6 for caravan hookup is different (includes 'or equivalent') to that in 717.52 for mobile & transportable units, which really does 'demand' H07RN-F.

    I guess the 'or equivalent' could be debated until the cows come home - for my money, H05RN-F and H07RN-F are 'general purpose cables' in BS EN 50525-2-21, similarly H05VV-F to BS EN 50525-2-11 are 'ordinary duty cables"  - and in both standards the cables are intended for connection of appliances to a supply by a flexible connection - the difference being that of insulation and sheathing material. (In this case, not water resistance, as that would require H07RN8-F.)

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