elv

elv

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  1. N

    Spacing between LV and ELV?

    Planning on running some conduit for ELV while I get the chance during a renovation. I've seen a bunch of different figures for how much spacing you should keep the LV mains lines from the ELV (Ethernet, HDMI, etc.) to avoid any possibility of EMF interference, although it was mostly American...
  2. HappyHippyDad

    Running LV and ELV cables together through joists?

    I have quite a bit a cat5e to run through joists under floorboards for ethernet points around the house. Can this run in the same joists as the LV cables or do you make separate holes in the joists for the ELV cables? Cheers guys.
  3. H

    Regulations for 12V / 240V wiring in campervans

    So wiring in campervans is included within the scope of BS 7671. In a scenario where someone is being paid to build from scratch or modify a system, is there a minimum level of qualification required by law? Would a "Part P NICEIC domestic installer" be appropriate to carry out and certify the...
  4. C

    Roof isolator ELV array

    Hi everyone, I have asked 3 different installers who answered YES, NO, and I will have to find out. On a small ELV solar array (74V/18A) is a rooftop isolator required in the regs? There will be 12 x 250W panels (VOC 37V ISC 9A) feeding 2 MPPT controllers, Victron 100/50 and 100/30 Panels will...
  5. charlie76

    CSA Of cables for ELV LED lighting circuit

    I have just purchased a transformer for some under cupboard strip LED's. The unit is CE marked. The ELV side of the transformer has 2 short flexes coming out of it with a CSA of 0.75mm². I was going to just extend these out to the 2 strips of LED lighting I am installing but after reading...
  6. infinity

    free ELV charging points?

    Hi, I have a customer that had asked for a free electric car charging point as another installer is ordering this as there is a government grant at the moment, does anyone have any info on this or where I can obtain the grant?
  7. C

    ELV down lighters fault- 4 failed at once!

    morning lads, Right so was just going to change some sockets in my own house this morn.... had my socket tester bleeping away and flicking through MCBS (couldnt remmeber which circuit was on as is old house) and saw the light flicker (was only turning off socket MCBS mind). Eventually found...
  8. yellowvanman

    ELV Humidistat

    Got a Manrose ELV Humidistat and promptly read the instructions (as you do). Control box should be installed >2m from shower/bath, out of reach of anyone in bath/shower. Its not as if someone can open it up and fiddle with it whilst in the shower as you need a screwdriver to open the box to...
  9. 1Justin

    ELV cable outside zone

    Wiring ELV (24V max ELV 2 wire) boiler 'stat. Hidden cable. - Would you be too bothered if you needed to break "zones"? (*Where it also makes it easier to provide segregation from Band 2, and otherwise would cost a lot more and put the Customer off?)
  10. B

    ELV transformers

    Does anyone know how I can determine how much wattage a 105va transformer can hold and how to calc it? Not done this type of thing since college and use to using 1 transformer for 1 light
  11. A

    ELV lighting fault

    Hi I am currently training to be an electrician but am only part qualified at the min. A friend of mine has asked me to fix some ELV downlights in his kitchen. Apparently when he switches them on sometimes it can take up to 10 mins for the lights to actually come on other times it can be a few...
  12. G

    volt drop on elv LED wiring

    Hi. I'm new to LED wiring and am wondering how to work out volt drop when using 24 volt drivers and 2mm elv cable. The length of run is about 20 metres. I've read that the 4% stays the same as 230v but what would be the maximum length of cable that could be used?
  13. L

    ELV LED Lamps

    Hi Everyone can any one recommend good quality ELV LED lamps that work in most transformers without flickering and have a good lumens output (bright). Also I have been changing a lot of spots recently - Just want to know what you do when you come across ELV halogen light fittings and need to...
  14. G

    Elv lighting

    Hi, I am wiring in some elv led lighting. Would like to know if the 12v part of the wiring circuit must conform to same regs as 230v wiring with regard to safe zones. Also is there a required depth if the cable is buried in the wall. Cheers. Gra.
  15. G

    ELV Conundrum...

    A client has 8 ELV down lights in a ceiling in an single story extension on the kitchen, so there is no roof space. There are 3 switches 1 controlling 2 ELV and the others each 3 ELV lights. 2 ELV circuit works fine 3 ELV circuit 1 - one light still works 3 ELV circuit 2 - no lights working...
  16. J

    Double Insulation on low voltage (ELV) downlighters

    Replaced a load of downlighters today with the the lamp holder cable being connected to the tranny with a choc block but no choc box, ie not double insulated. Am I right in thinking this does not comply or is it ok as theyre low voltage?
  17. P

    IR on ELV lighting

    Thinking ahead here. If I need to do an IR test on an ELV lighting circuit should I do it like this: Disconnect tx from LV side and do IR test at 500v, record results. Disconnect tx from ELV side, remove lamps from fittings and perform IR test at 250v, record results. Reconnect LV ELV and...
  18. telectrix

    ELV in bathroom

    Reg. 701.411.3.3 RCD for bathroom circuits. Suppose 4 12v downlights in bathroom ceiling, trannies in loft, switch outside bathroom. As there is no 230v in bathroom, does the aforesaid reg. apply? Max. touch voltage well below 50v. Other opinions sought
  19. K

    ELV land mains voltage lights on same circuit

    Hi, I know that with ELV lights if one lamp goes, the remiaining ELV lights get overdriven and the voltage they receive increases. But what if each individual light is powered by its own 12v transformer? Does the same thing happen and if a certain number of lights go, can it lead to all the...
  20. T

    Bathroom bond with ELV lighting?

    Hi All, Could one of you chaps clarify this for me? As I understand it: a) no supplementary bonding is required if all circuits are RCD protected and meet disconnection times. b) no RCD is required if ELV lighting is used. Therefore, is supplementary bonding required for point b? (assuming...

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