1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

B What is the use of a grounding stick

  1. Nov 15, 2016 #1
    suppose there was no ground stick at power generating station .
    then there would be no reason for a person to get an electric shock.
    no need for ground wires.
    only live and neutral wire for domestic supply.
    why is the neutral wire connected to earth at generating station
  2. jcsd
  3. Nov 15, 2016 #2


    User Avatar
    Science Advisor

    If the person bridges the live wire and ground it will still get a shock.
  4. Nov 15, 2016 #3
    but there would be no potential difference between live and earth if there is no ground stick at power generating station
  5. Nov 15, 2016 #4


    User Avatar
    Science Advisor

    Then it wouldn't be live but earth.
  6. Nov 15, 2016 #5
    i meant to say where is return path of current
  7. Nov 15, 2016 #6


    User Avatar
    Staff Emeritus
    Science Advisor

    I believe the grounding system is there to protect equipment and workers in the event of a fault and to prevent a floating ground situation, but this is just based on a few minutes of looking into this.
  8. Nov 15, 2016 #7


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    What is the capacitance of the planet? Of course you're going to get knocked on your butt.
  9. Nov 15, 2016 #8
    In NZ the power stations generate 3-phase power and have a local neutral to earth connection but as the three phases are balanced there is no current flow to the earth. Only the three phases leave the station. After going through sub-stations the single phase domestic supply is unbalanced and has phase to neutral current flowing. It may be different where you live.
  10. Nov 18, 2016 #9
  11. Nov 19, 2016 #10
    why is the earth considered to be a const potential of 0 V
    capacitance of earth must be gigantic to resist change in potential due to any charge gain or loss
  12. Nov 21, 2016 #11


    User Avatar
    Science Advisor

    For practical purposes, it does not matter if the potential of the whole earth goes up or down. The potential difference between Cleveland and Chicago, between building A and building B or between the neutral coming from the power company and the grounding rod stuck into your soil are what matter.

    If you were in the business of selling electrons to Martians, the overall potential of the earth could affect your launch budget, I suppose.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted

Similar Threads - grounding stick Date
B Speed of objects as they hit the ground Oct 17, 2017
I How does the reaction force of friction affect the ground? Oct 4, 2017