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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 .

Parents
  • 0

    Are the downlights higher than 2.25 Metres?

    Z.

  • 0 in reply to Zoomup

    Thank you for your response, however I am an electrician and am aware of Bathroom Zones. To be specific I would generally be using LED strip in Zone 2. My understanding is that electrical separation by double wound transformer is required and that separation by electronic means is no longer allowable, hence my request for guidance on a suitable product.

  • 0 in reply to Chris Howard

    Hello Chris, the original post referred to downlights, that is why I posed the question. Most ceilings in bathrooms are higher than 2.25 metres so there is no problem.  Section 701 deals with locations containing a bath or shower. Most modern rooms have a ceiling that is out of the zones. That was the reason for my question. Surely a small double wound isolating transformer is not too expensive to ensure safety. I would not trust the Chinese made electronic power supplies that power an L.E.D. strip to be safe in a bathroom, or shower room, where the lights are touchable.

    There is just so much that can got horribly wrong inside an electronic power supply that may cause the input supply Voltage to appear on the output terminals.

    www.bing.com/.../search

    Z.

Reply
  • 0 in reply to Chris Howard

    Hello Chris, the original post referred to downlights, that is why I posed the question. Most ceilings in bathrooms are higher than 2.25 metres so there is no problem.  Section 701 deals with locations containing a bath or shower. Most modern rooms have a ceiling that is out of the zones. That was the reason for my question. Surely a small double wound isolating transformer is not too expensive to ensure safety. I would not trust the Chinese made electronic power supplies that power an L.E.D. strip to be safe in a bathroom, or shower room, where the lights are touchable.

    There is just so much that can got horribly wrong inside an electronic power supply that may cause the input supply Voltage to appear on the output terminals.

    www.bing.com/.../search

    Z.

Children
  • 0 in reply to Zoomup

    Hi Zoomup, I completely agree. Still searching for the product though !

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