Results 1 to 6 of 6

Thread: Neat NCV trick

  1. #1
    Join Date
    Dec 2012
    Location
    columbus, OH
    Posts
    3,161
    Post Likes

    Neat NCV trick

    Next time you have your NCV handy grab hold of the insulated portion of a hot wire or hot and neutral extension cord(works either way) with one hand and test your nearest partner with your NCV in the other hand. Lol wow hes hot. Its a neat trick any insight on the subject?

  2. #2
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    23,947
    Post Likes
    Electro Static charge.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  3. #3
    Join Date
    Dec 2012
    Location
    columbus, OH
    Posts
    3,161
    Post Likes
    I have been told its due to a capacitive factor of the insulation between the wire and your skin. I have not grabbed a bare hot wire to compare to. I dont pretend to understand this one. I assumed its similar to the shock risk of an ungrounded system?

  4. #4
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    23,947
    Post Likes
    A good example is the video of the helicopter riding high tension lineman.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  5. #5
    Join Date
    Dec 2012
    Location
    columbus, OH
    Posts
    3,161
    Post Likes
    Quote Originally Posted by timebuilder View Post
    A good example is the video of the helicopter riding high tension lineman.
    I have watched this. Although the helocopter is isolated arching occurs until they bond on. Is that what your getting at?

  6. #6
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    23,947
    Post Likes
    Yes.

    That effect is due to the strong electrostatic field from the high tension wires, and the arcing occurs even though the helicopter us not in any way grounded.

    The point is that energy can be transferred from body to body without what we typically see as a "complete" circuit.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







Posting Permissions

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

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Comfortech 365