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SELV - Not a fan of?

whjohnson
Short question - is a mains voltage extractor fan permissible in zone 1 or 2 in a bathroom provided it is protected by a 30ma rcd and that all IP requirements are met??

OSG chapter 8, Table 8.1, page 94 says only 25vAC or 60v ripple-free DC SELV or PELV, yet I have just been to the wholesalers to look at what they have, and they showed me two mains fans with "Suitable for" or "Complies with" Zone 1 emblazoned on the packaging.


I am looking to fit a fan with a humidistat but am struggling to find a SELV version if that is actually required.

So, which is correct? The manufacturer (whose instructions must be followed) or the on site guide, whose instructions must also be followed!


Comments welcome.


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  • 0
    whjohnson:

    Also, the OSG is a guide, so is it that which 'must' be followed?


    I have often found myself asking that very same question!


    There is a "precedence" in legal terms



    1. Legislation: you have to whether you like it or not

    • Approved Codes of Practice / Approved Documents: Well, if you don't follow them (particularly the HSE ones), you have to prove in court you did something at least as safe. This is a little counter to the "innocent until proven guilty" premise, but it's there in legislation all the same, and has been for too many years for anyone to say it's unfair.

    • British Standards: Can be used in court as evidence. (What they don't explicitly say, is that it's evidence by BOTH sides, prosecution and defence).

    • Industry Guidance ... is just that, good practice. But well worth doing all the same, because it might avoid any issues with 1 to 3 above, provided it doesn't conflict.

Reply
  • 0
    whjohnson:

    Also, the OSG is a guide, so is it that which 'must' be followed?


    I have often found myself asking that very same question!


    There is a "precedence" in legal terms



    1. Legislation: you have to whether you like it or not

    • Approved Codes of Practice / Approved Documents: Well, if you don't follow them (particularly the HSE ones), you have to prove in court you did something at least as safe. This is a little counter to the "innocent until proven guilty" premise, but it's there in legislation all the same, and has been for too many years for anyone to say it's unfair.

    • British Standards: Can be used in court as evidence. (What they don't explicitly say, is that it's evidence by BOTH sides, prosecution and defence).

    • Industry Guidance ... is just that, good practice. But well worth doing all the same, because it might avoid any issues with 1 to 3 above, provided it doesn't conflict.

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