insulation

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  1. 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...
    • Joseph Lewis
    • Thread
    • circuit disconnect insulation insulation resistance insulation resistance testing lighting lighting circuit neutral neutrals readings resistance testing
    • Replies: 7
    • Forum: Commercial Electrical Advice
  2. 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.
  3. 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????
  4. 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...
  5. 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...
    • Bradley6969
    • Thread
    • consumer insulation insulation resistance resistance switch switches
    • Replies: 2
    • Forum: Lighting Forum
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. simpson93

    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...
    • simpson93
    • Thread
    • 10mm 6mm cable cables double fuse insulated insulation meter meter tails tails
    • Replies: 32
    • Forum: UK Electrical Forum
  11. 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...
  12. J

    CTEC intermitant zone fault

    Hello can any body help I have been pulling my hair out for 2 days in a carehome we have a ctec conventional panel that is coming up zone 6 fault the problem is its in fault sometimes for 2 seconds then clears sometimes 5 to 10 mins which is not giving me enough time to properly investigate. I...
    • John Hope 1970
    • Thread
    • devices fault insulation other panel sometimes
    • Replies: 4
    • Forum: The Welcome Forum
  13. J

    Low Insulation resistance readings when connecting final socket on ring?

    Hello All wondering if anyone could shed some light on a problem i have with my IR readings. I recently rewired a house.. took care pulling cables in etc . finished 1st fix, checked cables by looping ring main in connector blocks and doing continuity and IR test . continuity was ok, IR read...
    • Justintime
    • Thread
    • conductors connecting fault final insulation insulation resistance readings resistance ring socket sockets testing
    • Replies: 16
    • Forum: UK Electrical Forum
  14. B

    Downlighters in solid insulation in a warm deck roof

    We have been asked to install downlighters in 100mm insulation below a air ventilation space in a warm deck roof. Our concerns are as follows;-- We could use led luminaires but some future occupant may change these for halogen resulting in fire damage The building inspector is not going to be...
    • big willie
    • Thread
    • downlighters insulation solid
    • Replies: 6
    • Forum: UK Electrical Forum
  15. O

    A question of insulation.....

    Ok chaps, one of my jobs today was an EICR and when I took the cover off the CU I found this..... So would you code it or simply comment? Thanks and every day is a learning day!
  16. S

    Insulation resistance problem

    Hi all i was wondering if anyone could shed some light on my problem. Came to test a ring circuit today L-L 1.23 ohms N-N 1.23 ohms E-E 1.98 R1+R2 0.73 then i did my insulation resistance tests L-N 500 ohms N-E 500 ohms then L-E 0.00. Nothing plugged in, only a few sockets connected the rest in...
  17. LWS_Electrical

    Light switch stuck to wall

    Hi all, What would you code a light switch that has no box whatsoever? it literally is stuck to the surface of the wall. It seems that it was once installed correctly but then the owners insulated the house with celotex and a plaster skim and instead of cutting in a new box they just pulled the...
  18. sjhall

    Megger MTK320 Electrical Test Kit: MIT320 Insulation + LTW325 Loop + RCDT320

    Here we have a compete Megger 320 kit including all cables. Kit is in excellent working condition and was regularly calibrated and checked up until June last year when the calibration expired. I've not shopped around for calibration quotes but I paid from £70 to 90. . Rather than the...
  19. S

    insulation resistance query

    Hi, I'm after a bit of advice. British gas installing a new boiler, refused to install as fault on electrical system. The RCD trips when performing an ELI test. I've had a quick look tonight, TT system, rcd tests out ok. IR was 10 Mohms on all circuits except downstairs socket where...
  20. M

    Shower wire

    How can I calculate ? How do I know what size cable I need? 9.5 kW shower 40 C ambient temperature T+E cable installed in loft space 25m length of run type B breaker In 9500\230 = 41.30A In 42A

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