earthing | Page 10

earthing

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  1. T

    Earthing.

    So I'm currently testing a system and was wondering what earthing documentations is needed/sufficient. The company I'm working for doesn't have any records so thought here would be the best place for advice. Using a low resistance ohm meter do I need to record measurements from the main...
  2. Pete999

    Earthing systems explained

  3. Pete999

    Pete's Videos Earthing systems explained

  4. Pete999

    Pete's Videos Earthing systems explained

  5. S

    SWA earthing

    I’ve seen debate in the past on here about whether to earth both ends of SWA at the glands even when using 3 core with a core as the cpc. My question is: If I gland the load end and earth the banjo there, then gland the supply end but run the 3 cores straight through the building skin so there...
  6. F

    Back box earthing

    Probably a bit of a noddy question but I am bringing my TV aerial cable into the house which I have already done. Now I want to fit a TV socket to the wall to tidy it all up. I have purchased a metal back box with a plastic TV coaxial faceplate. On the metal back box there is an adjustable lug...
  7. M

    Earthing an Outbuilding

    This is my first posting here - I am not an electrician so please bear with me. I am trying to establish the best method to provide earthing of a 60A supply to a new build garage / workshop to be taken from a domestic residence. The incoming supply to the house is TN-C-S with a supplementary...
  8. D

    Earthing arrangement

    Is anyone able to clarify with me how i can work out what earthing arrangement i have on site. Supply comes into one of our motor switch rooms from an 11kv to LV transformer located directly outside. I can see 4 big copper bars (3phases and neutral) coming in which will then feed off to the...
  9. L

    SWA gland earthing

    Hi all, Just having a chat with a customer who we do regular maintenance work for. They have had an extension and got another company in to do the electrics due to us not having the time. The main reason for the post is the installer has used self tapping screws on all the swa glands. Is there...
  10. M

    earthing system?

    having a slight disagreement with a maintenance guy on a job im testing... just a bit of banter, but can any confirm this earthing system..?!
  11. M

    Inverter earthing query

    I am looking at an Edcoa 2500 inverter which produces 230v pos to neg but half of that to earth. The installation is on a boat and the boat boiler is looking for 230v to earth. Can I bond the ac neutral to earth to acieve this? Thanks
  12. timhoward

    Multiple distribution boards and earthing arrangements

    Hi all, first post, and it relates to quite a challenging installation. The short version is that I'm working through remedial work on a 75 page EICR on a site with 24 distribution boards, hit a very nasty C1, have resolved it, but now have max Zs issues that were actually there before but not...
  13. D

    Earthing a PV system question

    I am fitting up a small PV system on a porch roof using a small (Plug in Solar) 4 panel rig just would like to know if its lightning earth grounding wire can be threaded under tiles to emerge as required at its brackets (to be neater), or would it need to be topside. Figure there are rules for...
  14. L

    Earthing across flanges

    With regards to electrical continuity across pipe flanges to bs 7671 I cannot find anything on how to size flat braided cable. Could someone point me in the right direction please is there a rule of thumb with regards to bolt size? Thanks
  15. Zdb

    High integrity earthing

    Only time I've done this has been using the two separate CPCs of a RFC using different terminals inside the D.B as per 543.7.1.204 I've been asked to test a load of high integrity radial circuits with two separate (different sized) CPCs. My question is, in the box which asks for the CSA of the...
  16. S

    Hazardous areas - control voltage transformer earthing -

    I've been in an ongoing debate regarding earthing of a control transformer and i'd like some other opinions. 690 primary, 120v secondary supplying control circuits (contactors/DC convertors etc), the neutral is tied to earth - My issue is the location that it is tied to Earth. As far as I know...

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