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Which bits of domestic wiring does BS 7671 cover?

AJJewsbury
As BS 7671 has been gradually extending its scope over the years, so we're now just about at the point that it covers any electrical installation that isn't specifically covered by another (BS?) standard (to paraphrase section 110) - and specifically mentions communication, signalling and control fixed wiring. So I'm trying to figure out what standards apply to what:


A few examples:
  • Power and lighting - yes, I'm happy that's just BS 7671.

  • Phone cabling - comes under BS 6701 that seems clear enough (maybe in addition to BS 7671, but there's room for deviation from BS 7671 demands all the same)

  • ELV intruder alarm wiring - I've come across BS EN 50131 series but can't tell (without paying a fortune) whether that covers just individual components or also acts as an installation standard - anyone know?

  • Fixed speaker wiring (say from a wall or ceiling speaker to 4mm sockets/binding posts on the wall behind the hifi)

  • UHF co-ax (i.e. TV aerial/satellite)

  • LV control wiring for CH systems (I'm guessing this is BS 7671 although every EICR I see seems to suggest otherwise)

  • Likewise similar wiring - e.g. pump/valves for solar thermal systems, air-con or heatpumps.

  • ELV heating control wiring (e.g. from 12V 'network' type room 'stats to underfloor heating manifold controllers)

  • Structured cabling (CAT 5 kind of thing) - usually done to TIA/EIA-568 - am I right in thinking that BS EN 50173 is equivalent?


Anyone know of some standards that would apply to these instead of (or in addition to) BS 7671? Or on paper at least, should I be looking to find sheathed speaker cables, IP2X binding posts and a suitable 30mA RCD for when they're concealed in the wall (as far as I can tell the amplifier isn't a SELV source), intruder alarm contacts that don't rely on the timber door frame to complete the enclosure, or co-ax that complies with BS 5467, 6724, 7846, 8436 or 60702-1? ?


   - Andy.
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    David,


    Another perspective, is that whilst BS 7671 provides the basic electrical safety standard (and it is in this respect that the other standards refer to BS 7671), the other standards fulfil the role of functional performance and application- or system-specific requirements. For BS 7671 to contain the performance requirements in the plethora of standards (e.g. BS 6701 alone can't be used for telecomms cabling, it in turn refers out to a host of other standards including BS EN 50773-series and BS EN 50174-series) would mean it becomes huge, unintelligible in many respects, far more costly, and would require more frequent updates.


    So, perhaps it's not that the same information is duplicated in other places. In fact, BS 6701 is interesting in this respect - it was reeled back in respect of "crossover requirements" over 20 years ago - before that, I guess the history of the public telephone network meant that BT wanted more control over wiring and equipment connected to their network.
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    David,


    Another perspective, is that whilst BS 7671 provides the basic electrical safety standard (and it is in this respect that the other standards refer to BS 7671), the other standards fulfil the role of functional performance and application- or system-specific requirements. For BS 7671 to contain the performance requirements in the plethora of standards (e.g. BS 6701 alone can't be used for telecomms cabling, it in turn refers out to a host of other standards including BS EN 50773-series and BS EN 50174-series) would mean it becomes huge, unintelligible in many respects, far more costly, and would require more frequent updates.


    So, perhaps it's not that the same information is duplicated in other places. In fact, BS 6701 is interesting in this respect - it was reeled back in respect of "crossover requirements" over 20 years ago - before that, I guess the history of the public telephone network meant that BT wanted more control over wiring and equipment connected to their network.
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