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AM2 changes on sources for SELV and PELV

roger Farnsworth

I wonder if anyone here can shed some light on this matter ! - 

 According to BS7671 reg 701.414.3  SELV or PELV supplys in zones 0  / 1 / 2  as described in reg 414.3 (iv) shall not be used  , therefore my question is this , we have previously used IP67 rated 12 / 24 v DC switching mode power supplies to feed colour changing LED downlights in pool areas etc - does the change to BS7671 now make this non compliant ??  and do i now require the extra expense of an isolation transformer ??  I recently asked this question during a seminar on the new AM2 regs , and nobody came up with an answer !?!

Thanks .

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    My assumption was that normal lighting 'transformers' (including electronic ones) would provide isolation according (i) or (ii) - and that (iv) was only for some weird and wonderful contraptions that didn't provide conventional isolation from the mains (the note talks about test equipment).

    Looking at a couple of data sheets though I can't see BS EN 61558 obviously mentioned though - maybe it's implied via more specific product standards or may be I'm being overly optimistic...

       - Andy.

  • 0 in reply to AJJewsbury
    AJJewsbury said:
    My assumption was that normal lighting 'transformers' (including electronic ones) would provide isolation according (i) or (ii) - and that (iv) was only for some weird and wonderful contraptions that didn't provide conventional isolation from the mains (the note talks about test equipment).

    Switching type converters are becoming the norm for these "transformers" particularly LED drivers. It depends on how the converter is made.

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  • 0 in reply to AJJewsbury
    AJJewsbury said:
    My assumption was that normal lighting 'transformers' (including electronic ones) would provide isolation according (i) or (ii) - and that (iv) was only for some weird and wonderful contraptions that didn't provide conventional isolation from the mains (the note talks about test equipment).

    Switching type converters are becoming the norm for these "transformers" particularly LED drivers. It depends on how the converter is made.

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