Welcome to Koi Forum. Is this your first visit? Register
Results 1 to 7 of 7
  1. #1

    How to test for electricity leak?

    Started netting some fish to give them a once over, one of the koi seems to have a bent back.

    Now I look at the fish everyday and never noticed this and is very prominent now I've seen it.

    So I've either damaged it when netting (hopefully not the case!), disease or potential electric leak. So wanting to cover all bases and wanted to check an electric leak.

    Sent from my KFMUWI using Tapatalk



  2. #2
    Senior Member Rank = Supreme Champion davethefish1's Avatar
    Join Date
    Apr 2019
    Location
    Bedworth
    Posts
    5,952
    Thanks / Likes
    11902
    multi meter, ~240V
    negative probe to earth and positive tip in water.
    though you may get some induced voltage from pumps/heaters.
    it should be low, less than 10v

  3. Thanks CBKOI, Ajm, dbs, RS2OOO, freddyboy, john1 Thanked / Liked this Post
  4. #3
    cheers

    so test it as it's all running, then if i switch it all off does it lose any charge straight away?

    then i can turn one each item 1 by 1, testing as i go?
    Last edited by CBKOI; 28-11-2020 at 03:31 PM.

  5. Thanks john1 Thanked / Liked this Post
  6. #4
    Senior Member Rank = Supreme Champion davethefish1's Avatar
    Join Date
    Apr 2019
    Location
    Bedworth
    Posts
    5,952
    Thanks / Likes
    11902
    Quote Originally Posted by CBKOI View Post
    cheers

    so test it as it's all running, then if i switch it all off does it lose any charge straight away?

    then i can turn one each item 1 by 1, testing as i go?
    thats how i did it, nearly always turns out to be heaters, but occasionally pumps.

    just remember to not put hands in the water when your holding a probe to earth, as you could become the conductor if it is leaking voltage

  7. Thanks RS2OOO, freddyboy, john1 Thanked / Liked this Post
  8. #5
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
    Join Date
    Jun 2012
    Posts
    13,534
    Thanks / Likes
    19230
    If you have RCD or RCBO protection on your pond electrics that should start to trip out if you are leaking more than about 20 to 25 mA from live or neutral to earth even on a 30 mA trip as you'll have a slight leak on most things that on their own won't trip but when added together will trip.

    Dave's idea sounds like a good place to start though and if you detect any voltage it's probably a good idea to swap the item that's causing it before it becomes a bigger problem.

  9. Thanks freddyboy, john1, davethefish1 Thanked / Liked this Post
  10. #6
    Senior Member Rank = Supreme Champion davethefish1's Avatar
    Join Date
    Apr 2019
    Location
    Bedworth
    Posts
    5,952
    Thanks / Likes
    11902
    Quote Originally Posted by Frimley Koi keeper View Post
    If you have RCD or RCBO protection on your pond electrics that should start to trip out if you are leaking more than about 20 to 25 mA from live or neutral to earth even on a 30 mA trip as you'll have a slight leak on most things that on their own won't trip but when added together will trip.

    Dave's idea sounds like a good place to start though and if you detect any voltage it's probably a good idea to swap the item that's causing it before it becomes a bigger problem.
    Im trying to remember where i read it. But outside electrics can get very tricky depending on what you incoming supply is TT, TNS, TNCS.
    They had a broken neutral on a site i worked on years ago for temporary power. When a digger clipped a power cable.
    Everything metal and bonded to earth went live and nothing tripped!.

  11. Thanks Frimley Koi keeper, freddyboy Thanked / Liked this Post
  12. #7
    Extreme Koi Member Rank = Supreme Champion Frimley Koi keeper's Avatar
    Join Date
    Jun 2012
    Posts
    13,534
    Thanks / Likes
    19230
    Sounds like a bad one.

    You would have thought that if it was damaged while it was live it would have tripped something but if it not live and livened up later maybe it wouldn't have tripped when livened up as the RCD might not have been able to register the fault if that makes sense?

    I would have thought that PME would be the one that might not register a neutral earth issue in the right or wrong situations maybe?

  13. Thanks davethefish1, freddyboy Thanked / Liked this Post
 

 

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
All times are GMT +1. The time now is 10:19 AM. Online Koi Mag Forum
Powered by vBulletin® Version 4.2.3
Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.

vBulletin Improved By vBFoster® (Lite Version), © UltimateScheme, Ltd.