conductive | Page 3

conductive

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  1. P

    Water bonding on a PIR

    When carrying out a PIR do you actually have to see the earth clamp on the water pipe? I've had a few jobs lately where only the stopcock can be seen at the back of the kitchen cupboard and everything else is boxed in. I check continuity from the stopcock back to the CU and that is ok, but do I...
  2. S

    TN-C-S / Pyro / Outbuilding Upgrade

    Hi, bit of a job with scope creep going on. "Oooo it's so good we've found a nice electrician we can get all these things done that we've wanted for years". Client wants new outside lights on garage but existing isolation and circuit protection supplying garage is falling apart so that needs...
  3. J

    Extraneous conductive part - big problems!!!!

    Hi Some flats have been wired and since the 1st fix electric has been done, gas has been installed into the flats. As this wasnt there as the wiring was carried out, there is no bonding to the incoming gas pipe in the flat. There is no access to bond without major disruption within the...
  4. L

    correct way to test for a extraneous conductive part

    Hi everyone Can someone please clear up exactly how to test if something is a extraneous conductive part, is it using a insulation resistance tester? I have a installation where the incoming water is in plastic then copper throughout the installation. If someone could clear this up it would be...
  5. M

    Mains bonding query

    Hi all I'm going through my training and am confusing myself in regard to mains bonding. Is it there to protect the instalation from a fault withing the building or a fault outside the building making the incoming water or gas supply pipes live. Sorry to sound stupid but I need to get this...
  6. Doomed

    non conductive coating

    Testing again, my new boss seems to like me testing, even after the hassle I gave him with earth rods. Two plastic enclosers, linked by two 32mm metal couplers. The couplers have no banjos and are not bonded. I'm saying that this needs improvement. I will probably be tasked with doing the...
  7. Pip

    How can you Earth Bond plastic incoming mains water pipe?

    Hi People, Looked at a job today which requires adjustments to the CU and noticed there is 16mm from CU to MET which is cool, 10mm from MET to Gas main incoming, and bonding between all pipes coming in and out of the boiler linked off the GAS main bonding. When I pointed out that there...
  8. S

    What is an extraneous conductive part?

    Yeah another noob question. But the red bible keeps talking about it and after doing a bit of googling im still none the wiser. So if possible please enlighten me, perhaps give an example and if you can tell me the difference between an exposed conductive part, thx :) P.S be prepared for more...
  9. ringer

    Silicon conductive sandwich for pcb connections

    My trusty Fluke 12 multimeter has, after 15 years of solid service, started playing up. It uses buttons to change the functions, and they are somewhat intermittent in operation. Opening up the meter it is constructed with a silicone keypad, not dissimilar to the ones found in mobile phones, and...
  10. Z

    Bonding of metal trunking and metal encloseres

    Hi guys, Does anybody knows that in an industrial area bonding of the metal trunking parts and the metal enclosures counts as the main equipotential bonding? Becaouse this would effect bonding cable size. Thanks!
  11. W

    New MCB Board & the garage

    I am now in a postion to apply to join a relevant body for Part P approval. The CU in my house needs replacing (actually there are currently two as extensions have been added over the years) I will put in a new RCD split board but I am unsure about the feed to the garage which is away from the...
  12. D

    underfloor heating

    Hello, with regard to underfloor heating mats, the new regs 753.411.3.2 state, "in the case of heating units delivered without exposed conductive parts, a suitable conductive covering, for example a grid with a spacing of not more than 30mm shall be provided on site as an...

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