Results 1 to 2 of 2

Thread: Power surge and the earth spike

  1. #1
    Full Member
    Join Date
    Dec 2013
    Location
    Western Cape
    Posts
    55
    Thanks
    9
    Thanked 5 Times in 3 Posts

    Power surge and the earth spike

    Ok, so the criminals, during load shedding, stole a bussbar, and some neutral wires from a transformer.
    Now when the power came back on, some dwellings appliances burnt out. The power coming in was over 400v plus on single phase.
    Took best part of half a day for the council to reinstate the power after fixing the problem. They also put razor wire all over the transformers and tried to secure what they can.
    Now we checked the earth spikes of two of the dwellings that got struck and found that both earth spikes were fully operational, both had the correct readings.
    So now i assume that even good earthing, cant always guarantee protection from a power surge.
    I do know earth spike and earthing is very important on 380V installations,


  2. #2
    Diamond Member AndyD's Avatar
    Join Date
    Jan 2010
    Location
    Cape Town
    Posts
    4,403
    Thanks
    513
    Thanked 854 Times in 687 Posts
    Quote Originally Posted by ELECT 1 View Post

    Now we checked the earth spikes of two of the dwellings that got struck and found that both earth spikes were fully operational, both had the correct readings.
    What was the Ra readings? Is the earthing tn-c-s PME?

    The earthing of an installation is highly unlikely to have any effect on what damage is done when a neutral is floating. What happens in this situation isn't a 'surge' as such, it's a prolonged over-voltage event.
    _______________________________________________
    I am special and so is Vanash.
    _______________________________________________

Similar Threads

  1. SURGE ARRESTORS
    By ELECT 1 in forum Electrical Contracting Industry Forum
    Replies: 9
    Last Post: 24-Apr-15, 10:36 PM
  2. Surge Damage
    By AndyD in forum Electrical Contracting Industry Forum
    Replies: 0
    Last Post: 22-Dec-14, 12:49 AM
  3. Earth Spike.
    By IMHO in forum Electrical Contracting Industry Forum
    Replies: 10
    Last Post: 29-Nov-13, 11:06 PM
  4. power surge insurance
    By murdock in forum General Business Forum
    Replies: 1
    Last Post: 13-Dec-10, 12:06 PM
  5. Google Earth
    By Faan in forum General Business Forum
    Replies: 0
    Last Post: 30-Jul-08, 08:52 PM

Did you like this article? Share it with your favourite social network.

Did you like this article? Share it with your favourite social network.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •