insulation

  1. D

    Coax Cable Insulation Damaged, Copper visible, Cable can't be easily replaced I think

    Hi, I'd really appreciate your help. This is in Europe. I have no electrical knowledge and very little construction/DIY knowledge. I know electricians / cable-provider-technicians can measure coax signal strength at the outlet with a specialized device. A cable is damaged right down by the...
  2. R

    Plug socket wiring - insulation concern

    Hi, I replaced a plug socket today for the first time. When putting the live/neutral/earth wires in the socket, I noticed that the wires are not fully insulated where they come out of the wall. There is a small exposed piece of wiring which looks like it previously had masking tape around it...
  3. B

    Solar PV insulation fault ABB aurora inverter.

    Hi guys, I am new to the forum so be nice! I used to install solar PV systems back when the tariffs were still good, and I've never had to go back to one of my old installs because of a fault, so I'm not too clued up with regards to fault finding on PV. A customer has recently called me out to...
  4. mak

    Insulation resistance test on a ring final circuit

    Might be trivial question. My understanding is that we test on either leg of the ring since both legs make up a radial, but some say they test both legs at once, i.e. LL to NN, it would make sense if the other leg is not insulated since this is a live test, but I don't see why not if the other...
  5. B

    Derating cables laid on top of loft insulation

    Hi All, opinions please, just been to a property that has a 6mm cable ontop of 200mm of loft insulation so not buried. What de-rating factor would everyone apply to this Would it help if i could get it in some big trunking?
  6. Q

    Reference methods for cavity walls without thermal insulation

    Evening all Just wondering what would be the reference method given for a twin and earth cable in a cavity wall without insulation....I understand with insulation its either 102 or 103 but these massively de rate a cable and so was thinking is it b without the insulation as it acts similar to...
  7. M

    Wall insulation

    Just first fixed a house where I was initially told that the external walls were going to be battened then boarded, I used metal capping over the 2.5mm T&E ring final circuits on the external walls and chased the internal ones into the wall with 20mm oval conduit. I have now been told that the...
  8. wsoppitt

    Insulation resistance issue.

    This is a new 1 on me. Testing a ring final circuit within a timber outbuilding. All clear on insulation resistance with socket fronts connected but not screwed into metal back box lug. As soon as I connect any of the plates to the back box I'm getting around 16megohm between n and cpc. When...
  9. C

    Opinion On Cable Ampacity in Thermal Insulation

    Ok, so a while back I came across a rather interesting article referencing an incident where MC cable had been buried in thermal insulation resulting in a small fire. The magazine claims that if the cable was de-rated to BS7671 standards over heating would not have occurred. However, I am...
  10. UKMeterman

    50V insulation checker hire

    Hi, Any suggestions where to hire a 50V megger, I have a telephone installation where the BT fault checker is reporting low resistance and a standard multimeter can't do the job. Thanks
  11. HappyHippyDad

    Can I recycle cable insulation?

    Now I have my wonderful cable stripper I am left with lots of PVC insulation. I am loath to just put it in the bin. Can this be recycled? What do you guys do with your left over insulation? If I had left the insulation on and had it weighed in then the PVC insulation would have been recycled...
  12. T

    UK Cable under exterior insulation

    Hi, diyer here, only for laying cable!!! Before the builders arrive to clad my house with exterior insulation and rough cast I plan to attach a 1.5mm armoured cable to the house to future proof for a security/floodlight. The cable will run approx. 7m before entering through an old vent. Is this...
  13. E

    Insulation resistance check on LED fittings

    Hi, Do I need to disconnect LED fluorescent fittings when doing an insulation resistance check? Thanks
  14. Q

    Reference method for the old sheathed single core cables run in attic spaces with insulation

    Good morning I am just wondering what reference method is suitable for the old single core sheathed cables if they at some point enter an attic space under insulation.ive had a read through the regs book but still unsure Cheers for any responses Harry
  15. A

    UK Is this wiring in the attic with insulation okay?

    Hi, I have a guy working in my attic. I have been getting bad vibes off him for the last few days and things that are starting to raise red flags. So, I went into the attic to just have a quick look at what he is doing. (I have zero experience with electrical installation but what I saw looked...
  16. M

    What are the implications of a failed Neutral - Earth insulation resistance test?

    Greetings! Newbie here! We have 3 phase installation in our Lighting dimmer rack. During Insulation Resistance testing on Earth-Nuetral, readings was 0.33Mohm on 500v test. What causede the failed test and how can I troubleshoot? Thank you! Markus
  17. B

    Insulation Resistance Calculation

    Hi, I have an engineer who is completing his 2391-52 exam tonight and he has been told one of his mock questions was wrong, I have completed the working out myself and came up with the same answer as him, so either the paper is wrong or something has literally left my mind!! "Determine the...
  18. D

    UK DIY - Install Cat6 through rigid insulation glued to Drywall

    I'm looking to data points for Cat6 in a couple rooms through out my house. Plan is Patch Panel, though brushed panel, through eaves, terminating in a gang faceplate. I've got easy access to eaves so getting the cables from one wall to another should be easy enough. The walls are...
  19. G

    Insulation Resistance Testing

    Should I remove all the loads when testing between live and neutral?
  20. D

    Internal floor sound insulation and cable derating

    I'm looking at adding 100mm of sound insulation in an internal floor with 9x2" joists. The house has been rewired at some point so there are cables running unclipped in the void of the floor. Most of these are 2.5mm for the sockets, and also some for light fittings. Plastic radiator pipes are...

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