selv

  1. P

    selv pelv felv & testing of them (questions)

    Hi all hope everyone’s well. Sorry this a long read but I really want to get my head around this… simplified questions at the bottom of the long read… I’m struggling to understand it as there’s not many videos explaining it and lack of diagrams in GN3. I’ve been through bs7671 section 414 and...
  2. I

    Selv together with pelv

    Hi! I have a led strip (12V) with an external cable (2*1mm) glued on the wall and it's not fancy at all.. Inside the wall I have 3*1,5mm cable with 220V Can I put both cables together inside the wall? Thanks
  3. M

    Demista pads powered by a 24v SELV transformer, with cabinet hinge used as a conductor

    I'm working on a site in the UK where a joinery company will be installing bespoke vanity cabinets. The cabinets will have MDF/mirrored doors with a demista (heated pad) laminated between the mirror and the MDF door. The Demista is powered by a 24v SELV transformer, located behind a small panel...
  4. K

    Ideas on how to install SELV LED on wireless switch?

    Hi everyone I am going to install LED lightstrips in the garden which would be on the SELV and obviously it needs to be installed using stepping down transformer however the lights needs to be on wireless switch technology which would require another transformer to feed the stepdown...
  5. S

    SELV garden spike lights

    Hi, Years ago we had a sparky install some 240v garden lighting but to one of the points in the garden that we wanted lighting in he only installed a buried SWA cable and terminated it in a jb because at the time we needed some other work doing in that area before lighting could go in. Anyway...
  6. Z

    Selv circuit - short circuit - bulbs blown

    Garden lighting 12V AC from transformer wired with 2 wire and extension cables ran 2 LED lights in parallel. Unfortunately water and mud managed to cause a short circuit. The two lamp bulbs blown were further away from the transformer than the fault. Q1. Is this expected? Q2. Is there an easy...
  7. W

    Burying Selv cable

    Hi, I hear the regs for burying cables don't apply to SELV cables anymore? Is that right? Are there any requirements for buried SELV cables now? Yellow tape, minimum depth, mechanical protection? I'm shielding at home for 12 weeks and don't have access to my regs book otherwise ild check...
  8. Mark Wright

    Please Help L3 Design Project Selv

    Hi, i'm currently doing my Level 3 design project and it's going to be tricky with the coronavirus and lack of contact with Tutor and other students. Its the Hotel Swimming pool one and I have to select luminaries for the cafe pool. I haven't chosen my luminaries but I'm thinking to do it all...
  9. M

    Using low voltage lamps and Selv power supplies in domestic livghting

    Hi, I have a ceiling rose which doesn't have an earth wire and I want to connect a light fitting which requires an earth connection. It's not possible to rewire the ceiling rose at the moment so I am considering the possibility of using a low voltage (12 - 85 volt DC) E27 led lamp connected to a...
  10. velmareth

    Just don't understand why SELV pullcord won't work

    I've recently purchased a SELV pullcord extractor fan for my bathroom. I checked and 12v are running through where the old fan was so an SELV should work perfectly. I've wired it up as per this photo, but it doesn't work when I pull the cord. Could anyone help me understand why? The current is...
  11. R

    Selv fault protection

    If a selv circuit had a fault to earth, how is the fault monitored and flagged up
  12. John Lundrigan

    Explanation of SELV vs PELV?

    Hi All, The separated extra low voltage system excludes any connections to the earth on the extra low voltage side on the basis that such a connection would import a potentially high voltage on a protective conductor should a fault an earth fault exist on the low voltage side. PELV then...
  13. A

    Earthing selv lights

    Hi guys. If the transformer for selv lighting is actually sitting in the light fitting (i.e. A big bugger with multiple bulbs), should the fitting be earthed?
  14. T

    SELV Outdoor Recessed Brick Lights

    I have a customer who wants two brick lights installing in a wall either side of his electric gates. The Electric gate installer has installed flex from the control box to roughly where the lights would go, part of which is buried. Obviously I'm not comfortable about sending 240v down this...
  15. C

    double pole switch on a bathroom selv fan

    Just bought a xpelair 12v humidistat 100mm fan to go in zone 1 and reading instructions it asks for a d/p switch. Is that the regs ? I assumed it could be wired as normal i.e. live from light switch and perm live etc .. having looked into it a bit more it seems i could go 230 v if rcd protected...
    • cato
    • Thread
    • bathroom double fan installed light pole selv switch
    • Replies: 8
    • Forum: UK Electrical Forum
  16. C

    Protection By Selv, Pelv Or By Electrical Separation.

    Hi, I am relatively new to testing and was just doing some research into it all as some time in the future may take my testing and inspecting exam, I just wanted to confirm this test exactly as i want to make sure I'm understanding it correctly, I know nowadays this part of the test is quite...
  17. T

    Selv Pelv Felv

    Can you guys give me an example of what selv pelv and felv are? Cheers
  18. S

    What is the current 17th edition regs for 12v SELV Humidisat extractor fans in Zone 1

    As I understand it, they should have their own dedicated RCD After asking Mr Google I found this reference fro 17th Edition 2010Low Voltage Airflow Fans – Be Extra Safe The Airflow range of SELV (Safety Extra Low Voltage) fans fully comply with the current IEE wiring regulations 17th edition...
    • sintec
    • Thread
    • 12v 17th 17th edition current edition extractor fans regs regulations selv zone
    • Replies: 21
    • Forum: DIY Electrical Advice
  19. J

    SELV for Future Lighting Circuits ?

    A tutor went off on a tangent today and said that he wouldn't be surprised if in the future all lighting circuits in an electrical installation will be extra low voltage. (Connected to a transformer that'll maybe fit on the DIN rail of a CU?) I was just wondering what everyones opinion is...
  20. D

    Computer Power Supply: is it SELV?

    Just a quick question: would a circuit run from a computer power supply (this type: http://www.amazon.co.uk/tag/atx%20power%20supply/products ) FELV, PELV, or SELV? Thanks!
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