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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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    It's is interesting to see that a whole group of standards are attempting to specify wiring. This is precisely what is wrong! I don't know exactly who keeps adding all these others, but it is probably the same group who tried to control kettle and toaster power to save energy! There should be one standard only for each area, because otherwise they try to specify differing versions of pretty much everything, the result being that none of them are useful and simply give lawyers something to cause trouble and doubt the "evidence". All jobs for the boys, but not that which a proper system should either encourage or allow. It is in most cases simply scope creep by those who don't know or care or just want power over others.


    This kind of thing happens in all areas of "standards", if its not in one place it is not really very useful is it? BTW audio amplifiers which give 10kW into 8 Ohms are not unknown, but I have never heard of anyone getting a shock, despite a great deal of time in the industry. Perhaps we should prevent people from buying transformers now, because they don't know how to use them safely! A piece of EU rubbish now prevents one from using many useful chemicals, as some bureaucrat has decided that they are dangerous, including weedkiller, which now largely don't work at all.
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  • 0
    It's is interesting to see that a whole group of standards are attempting to specify wiring. This is precisely what is wrong! I don't know exactly who keeps adding all these others, but it is probably the same group who tried to control kettle and toaster power to save energy! There should be one standard only for each area, because otherwise they try to specify differing versions of pretty much everything, the result being that none of them are useful and simply give lawyers something to cause trouble and doubt the "evidence". All jobs for the boys, but not that which a proper system should either encourage or allow. It is in most cases simply scope creep by those who don't know or care or just want power over others.


    This kind of thing happens in all areas of "standards", if its not in one place it is not really very useful is it? BTW audio amplifiers which give 10kW into 8 Ohms are not unknown, but I have never heard of anyone getting a shock, despite a great deal of time in the industry. Perhaps we should prevent people from buying transformers now, because they don't know how to use them safely! A piece of EU rubbish now prevents one from using many useful chemicals, as some bureaucrat has decided that they are dangerous, including weedkiller, which now largely don't work at all.
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