Search results | Page 6

Search results

  1. KeenPensioner

    Can't figure ring final r1 + r2 divided by 4

    Hi...keen amateur here......don't crucify me for asking!! I understand Ohm's law and I understand the mechanics of measuring end to end on ring final and then joining incoming live to outgoing neutral etc, and I know that this configuration gives a figure of 8 (in fact can be straightened to...
  2. KeenPensioner

    DNO fuse - who can remove it?

    Yep, past the three score years an 10. Well retired from the chemical industry but keen amateur sparky who knows there limitations. Read a lot and worked as a mate for a couple of years after retiring.
  3. KeenPensioner

    Is there such a thing as a "DIY electrical job"?

    Hi......I'm not an electrician but have worked as an "electrician's mate" for a NICEIC registered contractor for a couple of years after I retired. I've been a member of this forum for a few months and enjoy reading the posts, hoping to pick up some tips. In the description of the site it...
  4. KeenPensioner

    Never give up

    Never give up
  5. KeenPensioner

    Equipotential Bonding Explanation

    Richard, thanks very much for comprehensive explanations.
  6. KeenPensioner

    Equipotential Bonding Explanation

    Richard.....I can't thank you enough for your comprehensive explanations. I "get it" after many hours (as an enthusiastic amateur) trying to figure it out. I now move on to supplementary bonding.....wish me luck. Thanks again.
  7. KeenPensioner

    Equipotential Bonding Explanation

    Richard......I can't thank you enough for your comprehensive explanation. I now understand what bonding is all about and can back it up with the maths behind it. I echo ELECNEWT's sentiments above. I'm now moving on to supplementary bonding! Thanks again.
  8. KeenPensioner

    Equipotential Bonding Explanation

    Richard...thanks again for your patience but I don't get the maths this time. I understand parallel conductors but am I correct in this....where you draw the fault current path in the small dotted line (from just under the MET to earth) one route is 0.1 ohms for the "earth path" and the other...
  9. KeenPensioner

    Equipotential Bonding Explanation

    Richard, thanks very much, I understand the maths behind this now. I've spent ages on this and eventually the penny has dropped thanks to all the responses here but in particular your excellent diagram. One point (a typo or me?)...for a resistance of 1000 ohms and a touch voltage of 57.5 volts...
  10. KeenPensioner

    Equipotential Bonding Explanation

    Thank you all again - maybe I'm not asking the right question so I've attempted to draw what I mean, bearing in mind all the advice that has been given regarding equipotential bonding, ADS activation times etc. The image tries to show a fault in a kettle where the casing becomes live and...
  11. KeenPensioner

    Never stop

    Never stop
  12. KeenPensioner

    Equipotential Bonding Explanation

    Thanks again.....I'm getting closer to understanding this. telectrix's explanation really helped and I can see that under fault conditions (because of bonding) both the kettle and the extraneous parts will be at the same voltage (230V). Without the bonding, only the kettle would be at 230V and...
  13. KeenPensioner

    Equipotential Bonding Explanation

    Thank you all for your prompt responses. I understand what PD is and current flow on fault (If). I understand what Ze, Zs, PFC, ADS, OCPD, MET, etc,etc are - I even understand the adiabatic equation and have studied the maths behind touch voltage (Ut). I understand how earthing works, but I...
  14. KeenPensioner

    Equipotential Bonding Explanation

    OK......I know I'll get slaughtered for asking this question because I'm not an electrician but I'm working my way through Level 2 Diploma in Electrical Installations for no other reason than I like to learn. I've searched the web till my head hurts and watched YouTube videos by John Ward...
  15. KeenPensioner

    C&G Level 2 Diploma Query

    In response to Strima #8, polo1 gave the answer in #6. Again, thank you all. Now I move on to Prospective Fault Current!!
  16. KeenPensioner

    C&G Level 2 Diploma Query

    Thank you all very much for your replies...especially on New Year's eve. To give an answer to Strima's question - we measure insulation resistance in Mega Ohms. I figured the answer to the question resistance should be the difference between the reading given for the protective conductor and...
  17. R2_answer.jpg

    R2_answer.jpg

    • KeenPensioner
    • Media item
    • Comments: 0
    • Category: Electrical Videos
  18. KeenPensioner

    C&G Level 2 Diploma Query

    How sad am I! Here in Scotland on New Year's eve I'm wading my way through the theory of "Testing Continuity of Protective Conductors" - Method 2 (Long Lead) from the C&G Level 2 Textbook on page 384. The question is: "The resistance of a long lead is measured at 0.89 ohms. The low-resistance...
  19. KeenPensioner

    DNO fuse - who can remove it?

    I fully understand why professionals are a bit skeptical about "mere mortals" asking questions about how it all works but I can assure you that I have no intention of going near the main fuse no matter what you may think. I am an amateur and always will be but that doesn't preclude me from...
  20. KeenPensioner

    DNO fuse - who can remove it?

    Hi....thanks for all the advice.....can someone tell me what an OP is?

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top