extraneous

extraneous

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  1. T

    Extraneous conductive part test

    Hi all, im aware of the test needed to be done when trying to find out if a metallic object is an extraneous conductive part but for example, if you had a copper water supply system in a house that is fed with a plastic incomer pipe out the ground you will always receive a low resistance reading...
  2. J

    Extraneous metal staircase

    If you were to test a metal staircase on the side of the house on insulation resistance and it gave you a dead short. Would that need bonding. Test was done at the MET with all parallel paths disconnected. Staircase next to class 1 metal light fittings
  3. Tequila

    UK Bonding of extraneous conductive frame

    TNC-S main supply with 16mm swa supplying garage consumer unit from main consumer unit in house, then 4mm swa supplying pond equipment through pond fuse box. (Pond cable run approx 40m) Pond has a metal unistrutt frame and cover over pond equipment, this frame has its support legs concreted...
  4. S

    Bonding Extraneous Structural Steel

    If extraneous structural steel is not exposed does it still require bonding Thanks
  5. L

    Voltage on high res. extraneous part

    During an FLI test recently on a high resistance extraneous part (several thousand ohm) I decided to test what voltage appeared on the metal while the test was been carried out.I used a Metrel M1 3000.I measured approx 40 volt. Its well over 20 years since I conducted a similar test and my...
  6. D

    UK imagine you have discovered a water pipe in a bathroom

    Q. imagine you have discovered a water pipe in a bathroom that has been repaired at some previous time using a plastic connector -So I am a little confused about this question because, I am being asked to explain why this situation can be dangerous also. how can you "remedy" the situation...
  7. L

    Extraneous part issue?

    A customer rearranged some kitchen units, exposing a copper section of the main waterpipe. It's just over a foot long(rest of house is Qualpex). However it's unbondedI carried out an Fli test and it maxed out. I next carried out an IR test and got a, reading of 7000 ohms. A little high for a...
  8. C

    Old MICC cable underground to garage, extraneous conductive parts

    Ok so the scenario is there is an old MICC or pyro 1.5mm 2 core cable supplying the garage run underground on a 16A circuit breaker that is RCD protected. In the garage there is a water pipe fed from the house, at the house it is bonded using 10mm, at the garage bonded with 6mm. I think the...
  9. J

    Bonding extraneous parts

    Do extraneous conductive parts such as hand railing have to be bonded back to the MET or can they be linked to a known earth ie uni strut or cable tray?
  10. Zdb

    Testing extraneous conductive part

    Just been read through this and it says: How to determine if it’s an extraneous-conductive-part For this, a simple measurement is undertaken. This is done by testing the resistance between the suspected extraneous-conductive-part and the MET or the nearest known connection to Earth, such as...
  11. cliffed

    Extraneous parts

    Code..for extraneous conductive parts not bonded at entry to various points @ school,the main water & gas are bonded @ intake,but water & gas are entering either underground or overhead elsewhere,& no definite earth connection.
  12. J

    Bonding Extraneous Conductive Parts

    hi. Question re bonding a metal where cold comes in as metal pipe ground into house. So cold will be bonded where service comes in. Read article in wiring matters 2019 about changes for part 18. Example given of faulty kettle where fault to earth exists at kettle, some one touches kettle...
  13. cliffed

    Extraneous conductive bits & pieces

    metallic portacabin used for offices,Swa is on a steel caternary,enters office to Rcd DB. No separation of swa earth Tncs @ cabin. I want to Tt it,what’s your thinking of caternary wire,it comes from building to cabin. Will this still import Tncs,& will it also need isolation from cabin,where...
  14. N

    Extraneous Parts Earth sizing

    Customer wants to take power from an existing garage (with board) to supply a greenhouse, to be fitted with ip rated switchgear. The greenhouse is made of aluminium. Since this is an extraneous conductive part am i right in thinking that the aluminium frame would require a 10mm bond at least...
  15. C

    Removal of extraneous conductive part

    within a building supplied my a PME system it’s not possible to main bond the extraneous conductive parts effectively back to the origin. Resolution instead of changing to a TT system remove the extraneous conductive parts. Water pipe: this comes out the ground so change this to plastic and...
  16. S

    Extraneous conductive parts

    Morning, so just finishing off the install to a shepard hut which is located in a field. The construction is steel chassis, plyboard floor, timber stud clad with corrugated sheets. The corrugated iron sheets which clad the unit are plastic coated and there is no continuity between each sheet...
  17. Ian1981

    Extraneous conductive parts

    Hi all. Looking for opinions on here. I’ve identified during an eicr that a dry rise pipe used for firefighters in the building is in fact an extraneous conductive part and that it is not bonded back to the MET. However what I’m questioning is it’s accessability to be touched in the event of a...
  18. kingeri

    Extraneous conductive part as bonding conductor

    Been nosying about at my brother's new house this week and fixing a few bits and bobs. The electrical installation mainly dates back to the early 80's at a guess and apart from a few broken accessories and a lack of RCD protection (now fixed) it has all checked out okay. PME earthing. Today...
  19. L

    Supplementary bonding

    Hello all, Perhaps a few of you could help my understanding of the following query. The situation I am about to describe is purely hypothetical to help my understanding of the issue. Let's assume within a domestic bathroom, I have a combination of exposed conductive parts and suspect...
  20. HappyHippyDad

    Main bonding made to separate earth rod?

    Evening all.. I have just been to a clients house to quote for some work and when checking the Main bonding I noticed that it just had a 10mm attached to the gas pipe and then straight into a separate earth rod, it was the same for the water (had it's own earth rod). I realise that this would...

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