electrode | Page 3

electrode

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  1. ste mac

    Water bond to earth electrode.

    On a domestic job today and came across an unusual bonding setup. The main house is TNC-S, supply to remote home office via SWA cable. The remote building has an oil fired boiler and the copper pipe work has a 10mm bond cable going out through the external wall to an earth electrode. The...
  2. S

    Pointers on installing TT Earth Electrode on a construction site

    Hi, I've got to install an earth electrode on a construction site. It's just a house, and there is a PME supply, but no meter yet, EDF want the electrode installed. I've tried putting the electrode in the ground and then did an EFC test and got 64.8 ohm reading. Should the this reading be...
  3. T

    Safe Earthing Electrode

    Pipe in Cage Technology having Electrolytic Earthing System is a multipurpose Earthing system. It has been designed to provide long term protection from lightning, electrical transients, static discharges, electro-magnetic interference and other electrical hazards. The system may...
  4. J

    no incoming earth on the supply cable,been told to put an earth electrode in.

    hi there i went to a job the other day,and found there was no incoming earth on the main supply cable,i was told by the supply company,to install an earth electrode,the incoming supply system is a t.n.s.type,would this electrode then make this a t.t. system,if so would i have to upgrade the...
  5. G

    Water pipe as earth electrode?

    Been asked to quote for a CU replacement in an old rectory. First quick look (no time to do any yests yet) shows supply is from 2 separate cables from the other half of the house (house split into 2). Assumed the 10mm earth conductor that is installed on the CU led to an earth electrode but it...
  6. T

    Earth Electrode Resistance

    Hi Guys Started working on a TT system doing a partial rewire tested earth electrode resistance Ra == 187.4 ohms! I know its getting close ot the 200 ohms mark, then read artical by NAPIT that BS 7430 advises max 100 ohms should I run new cable to exsiting rod and snik another rod and link...
  7. S

    Single earth electrode generator

    you have a 40Kw generator in a vast expanse of concrete genny is also raised up on 6x6 wood timbers one earth electrode genny works fine all voltages check etc you should be able to test the electrode with the bloody earth loop tester but that doesn't work. to confirm its a three wire tester...
  8. S

    Earth electrode resistence check

    Am using a Robin KMP 4118DL loop/PSC tester I have a generator and i want to earth it to the large metal building i'm next too at a earthing point, it should be a perfect earth with loads of earth points all over. I want to test that the earth so i've run the generator connected live and neutral...
  9. G

    TT system testing - problem

    Hi, can anybody throw some light on a problem / confusion i have? I'm in the process of installing a new TT system. The existing earth electrode had a high resistance in excess of 2Mohms. I've inserted a new electrode in a new location and measured the resistance immediately after inserting the...
  10. P

    solar p.v earthing

    can any one advise does the armouring on swa cable on dc side does it need earthing also does cable tray on dc side need earthing and what about containment on a roof is that left floating getting told different answers of different people people.and 1 more thing is there some kind of single...
  11. S

    Earthing arrangement at a factory.

    Okay, been working at a factory today and need to establish the earthing arrangement of it.. The power comes from a substation which has an earth electrode, then after the transformer the cables come into the factory with the earthing conductor.. Am i right in saying the installation is a...
  12. S

    earth electrode testing

    Hi Guys, Wonder if you can help ,im a little confused, When you do a live earth electrode test i understand that your measuring Ze, so you use the earth loop impeadance tester to get reading. Its the dead test earth electrode test that i dont understand, does this test measure Ze as well...
  13. S

    Measuring electrode resistance to earth using loop impedance tester?

    I'm going to be fitting a new CCU where the earthing arrangements at the property are TT. Obviously I will need to measure the electrode resistance to earth and as I don't have an earth resistance tester I was hoping to do it as described below. I assume the result is the number I enter on the...
  14. O

    PIR issues encountered.......assistance please

    Hi, Been doing a PIR today and the first circuit I tested I could tell that things were going to be difficult: 1. The ring circuit had no continuity end to end on, on live, neutral or CPC. After much investigation it would see that 1 short leg went to a 2 gang socket, and the other leg...
  15. W

    Certification for changing an earth electrode

    Hi All, I have to change an earth electrode/rod because of high Ze (365ohms). What certification should be issued? My niceic inspector once told me that a full EIC should be issued for this just like for a new consumer unit etc is that right? The reason i ask is beacuse the house i'm...
  16. S

    DNO hook up

    Hi Guys Have installed a new CU at clients house. The new CU is on the other side of the building so all circuit tails have been moved. On Tuesday the DNO are coming to install a new supply and meter on the new CU. I've tried to call the them to ask what exactly they want from me on the day...
  17. G

    earth electrode

    I have to install an earth electrode, which I have never done before. What are the limitations with regards to location? Can I install the rod inside the house under the floor and cut in an access panel? I have looked at the regs and can't find anything that says you can't. Regards.
  18. I

    TT 100ma Rcd + earth electrode??

    Hi al,l I am working on a tt system at present. I am going to be a adding a new d/b which will be ran from an existing board which has a 30ma main switch, controlling 1 other circuit i need to change the main switch to 100ma and the 1 circuit its controlling will need changing to a 30ma rcbo as...
  19. J

    Installing Earth Electrode Possible Gas/Water Pipes

    I've been asked to install an earth electrode. Do I need to check for pipes underneath where I propose to put the earth rod? Do I need to perform a CAT scan? I'm not entirely sure what a CAT scan is but if anyone is familiar with it, all information and advice is welcomed.
  20. J

    Testing Earth Electrodes

    I am currently working for a satellite and tv installation firm. The company have asked me to install Earth Electrode's for their installations. I have an ECS Card and am classed as an Electrician as I have C&G 2330 Level 3 NVQ. This would involve running a 6mm cpc cable from the connection...

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