insulation | Page 9

insulation

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  1. Pat H

    Drilling joists

    Doing a loft conversion and wondering about joist drilling. OSG states to drill in the middle of the joist 0.25 to 0.4 of joist length. I have 6" joists but the bottom 4" will be filled with 100mm celotex so If I drill at half way my cabling will be in the way of the insulation. It makes more...
  2. P

    Low insulation resistance reading

    i've recently installed a new Consumer unit at home and will be using it as my first niceic assessment. I'm getting an insulation resistance reading of 1.7 on a lighting circuit in the osg it says minimum reading of 1 is this going to be ok? I've discovered what section of the circuit is giving...
  3. N

    Insulation Resistance test with 12v transformers

    I am installing a C/U and the kitchen has some old Down lights installed with 10 x 12 volt transformers connected. I know I could disconnect all the transformers but I don't plan to do that as it will be a real pain due to how the plasterboard has been bodged. Some opinions suggest the IR...
  4. Dave

    How to check the integrity of insulation?

    I recently bought a house and started to rewire it. A sparks mate came and helped with a few bits and I got him capping the chases. He put a nail through a cable in one chase, then told me he may have done it in a couple of other places, he's not sure! I had a plasterer going round behind me...
  5. T

    Insulation Resistance Testing

    Evening chaps, In the process of taking my 2394/2395 testing course and just trying to fully get my head around insulation resistance testing predominantly in occupied domestic property's where it isn't possible to dissconnect all loads from the circuit. I am aware of the need to link out the...
  6. I

    Un-sound electrical connection of live conductors

    Guys can you explain what may result of un-sound electrical connection of live conductors? Your advices will help me alot, thanks✌✌
  7. G

    Load and heat

    Hello. New to this forum stuff so hopefully this makes sense. I've recently installed a 10mm 3core cable (H07FN-R) to power a 12kw electric boiler. On full power the boiler is drawing 46Amps. I'm a bit concerned as the cable is omitting a slight heat when drawing this load, was just wondering if...
  8. David Prosser

    Question about LED downlights

    I just need something clearing up as I have not done domestic wiring for a good few years now. If I fit LED down lights that have no replaceable bulbs so can’t be over loaded, do I need to fit the in intumescent hoods for lights going into the loft or just some sort of device to keep the...
  9. buzzlightyear

    micc on rcbo

    micc on rcbo will not set
  10. J

    Insulation resistance testing Lighting circuit

    Hi everyone. I'm looking for advise on how to test IR on commercial lighting. There's so many lights on 1 circuit , do I have to take out all the lamps in all the lights to perform the test or can I simply test between LN -E ? Even though I have spent lots of time testing domestic installs and...
  11. mrloy99

    Insulation test

    Hi All.Bracing myself here for torrents of abuse. Is there any reason why an I.R. test can't be done at a socket rather than at consumer unit.
  12. L

    Reference Meathod for Timber Frame

    Hi All Just done my first 2 timber frame New build. What is the reference method for cables installed in Timber frame walls full of insulation >100mm????
  13. David Prosser

    Cables in loft Insulation

    I’m an Industrial electrician and as such have limited knowledge of domestic installations (we all still use the same regs though). I’m wanting to know what people do about the increased insulation in lofts. For example my shower is a nominal 9.5kW with a 10mm T&E cable If I was to install the...
  14. B

    Insulation resistance

    Is this right anyone? So basically I'm gonna test the whole consumer unit with an insulation resistance test rather than every circuit would you do basically I need to show my college and I've only been testing since last week and need to show an insulation resistance test of the whole board and...
  15. B

    Insulation resistance test help

    Hi I want to test the whole board at once with an insulation test so turn off main isolator and breakers turn tester to 500v? And is the best thing to do, the incoming tails L+N put in a link between them and connect your probes to the link and other to earth also can you still operate light...
  16. D

    American Faceting Machine Testing?

    Hey Guy's, I had a client ask me last week if I do Pat testing and without thinking first I said yes! However some of the equipment he has is very old (40+ yrs) and American. I haven't agreed to do the job and I told him straight I would have to find out what is involved with testing them first...
  17. D

    Insulation Resistance - Head Scratcher

    Hi folks, Was sent out to a job today to add in a hot water pump underneath a kitchen sink in a kitchen that had recently been done up. Took with me just a socket thinking that the electrician doing the kitchen work would have RCD'd it - but no. The woman had her own joiner do the work so I'm...
  18. sparky1508

    Insulation resistance problem

    Hi all, I have done an insulation resistance test on a ring final circuit today and when I do L - N I'm getting 0.01Mohm. Checked all sockets for loose connections but found nothing. I plan on splitting the ring tomorrow and testing each individual length from socket to socket. It's gonna be a...
  19. S

    10mm meter tails 60amp fuse 6mm bond

    Afternoon all been a while since I've posted. at today's job I noticed 10mm meter tails with 6mm bonding and although my first thoughts were tails should be min 16mm and bonding 10mm so at the risk of sounding stupid I couldn't find the exact reason why this was wrong as the 10mm would take...
  20. F

    Insulation resistance test on a db supplied via a time clock

    Hi guys new to this website just a quick question as it has been a while I have a small 6 way distribution board this only becomes live via a time clock supply wired into it I'm going to be testing this board with a IR dead test on each circuit just to make sure according to guidance note 3 & on...

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