Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Grounding by touching a ground lead

Tags:
  1. Dec 18, 2014 #1
    Is it possible to sufficiently ground yourself just by touching the negative lead of a wire coming from a power supply once?
     
  2. jcsd
  3. Dec 18, 2014 #2
    No you need to stay connected to be grounded, and it needs to be to Earth ground.
     
  4. Dec 18, 2014 #3

    berkeman

    User Avatar

    Staff: Mentor

    If you are wearing a wool sweater on a dry day, you will charge back up within a few seconds of moving around after touching the ground lead. If you're not doing anything that charges you back up, it will take a while for any charge to build up on you again.

    BTW, it's good practice to ground yourself though a large value resistor like 1 MegOhm. This reduces the possibility that you can get shocked badly if you happen to be connected to some other voltage. ESD control wriststraps, for example, contain such a current-limiting resistor.
     
  5. Dec 18, 2014 #4

    davenn

    User Avatar
    Science Advisor
    Gold Member

    Plus, the negative lead from the PSU may not be grounded ( ie. its " floating")
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Grounding by touching a ground lead
  1. Ground state (Replies: 4)

  2. Ground vs Neutral (Replies: 17)

Loading...