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Wire for high voltage pulse

Discussion in 'Electronic Basics' started by Ron H, Jun 27, 2005.

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  1. Ron H

    Ron H Guest

    Can I use some RG-58/9 coax as a conductor for a fencer? The unit pulses
    about once per second at about 2500 volts. I need to feed a fence with about
    25 feet of conductor underground so I thought maybe using the coax leaving
    the shield ungrounded might work. Any thoughts? I figured that if I grounded
    the shield, it might act as a choke......


    Ron H.





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  2. Pat Ziegler

    Pat Ziegler Guest

    Ron:

    There are many types of RG/6 58 or 59. They all have different
    dielectrics so the ratings will all be different depending on the type.
    However, I do not believe any of them would have a 2500 Volt rating.
    Probably more like 300 or 600 volt.

    If you are dead set on using coax, don't hook the shield to anything on
    either end. And, put it in some PVC conduit when you burry it. This might
    work. To do it right I would get some HV wire at your local TV shop. Also,
    this would need to be in a PVC pipe of some kind to keep water and critters
    away from it.


    Pat Ziegler
    Wholesale Electronics Inc.

    www.weisd.com
     
  3. At this sort of frequency, the shield acts mostly like a bit of
    capacitance. And that doesn't vary much whether you ground it or not,
    once the cable is buried, since the soil surrounding the cable is also
    "grounded". But leaving it floating makes it a shock hazard. I would
    ground it. I also suggest that you strip the shield back a couple
    inches from the ends of the internal insulation, to keep the center
    wire from arching to the shield at the ends.
     
  4. Ron H

    Ron H Guest

    The data sheet that I have indicates that the RG-58/9 center conductor has a
    dielectric breakdown voltage between 1900 (58) and 2300 (59) volts. The
    outer covering is probably in the 500-600 volts range. Thus I am assuming
    that they would hold up for the max 2500 pulse leaving the shield
    unconnected.

    Do you really think that the PVC pipe is necessary?

    Ron H.




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  5. John Fields

    John Fields Guest

     
  6. John Fields

    John Fields Guest

    GTO-15 is another good choice. Check your local neon sign shop(s).
     
  7. Pat Ziegler

    Pat Ziegler Guest

    That depends on weather you want to dig it up again someday..

    I suppose you could find some "Direct Burry" coax, that would last longer.


    Pat Ziegler
    www.weisd.com
     
  8. John Fields

    John Fields Guest

     
  9. Pat Ziegler

    Pat Ziegler Guest

    John:

    I see you are up to your usual arrogance.

    I apologize, I forgot your opinion is the only one that counts.

    Your very special.

    You may want to consider removing the word "Professional" from you self
    description, Last I heard, "Professionals" don't act like children.

    And you will notice this time I am replying to the entire group so
    everyone can whiteness your behavior.. (thanks for the heads up)
     
  10. John Fields

    John Fields Guest

    ---
    This fucking moron, Ziegler, obviously has no clue, so I bottom posted
    his reply, above, so this exchange would make sense.

    If you care to continue, Ziegler, please reply with bottom posts and
    run your posts through a spell checker since you can't seem to get it
    right natively.

    Now, as for the statement that you're replying to the group "this
    time", let me then take the little discussion which has led to your
    getting your panties in a bunch public as well.


    First, I received this Unsolicited Commercial Email (SPAM, asshole)
    message from you:


    John:
    You might want to look at our selection of National Control Timers.
    We might have what you need allready put together.


    To which I replied:

    If you'd have bothered to post to the relevant newsgroup instead of
    SPAMming me, your lead might have been useful and appreciated.


    To which you replied:

    Geeze!

    I only replied to your question. I thought you might find the
    information useful, as in there may have been something there to help
    you out. Why so sensitive?


    To which I replied:

    ---
    No, you didn't reply to my question since I never asked one about an
    off-delay relay. Matter of fact, If you'd have read the thread you'd
    have seen that I sent the OP to Grainger's for exactly what he was
    looking for.

    I'm sensitive because I don't like SPAM or UCE. You sent me an
    Unsolicited Commercial Email message (SPAM) and I don't appreciate
    that. If you have comments to make about posts on newsgroups the
    proper netiquette is to keep those comments on the newsgroups.

    Please don't email me again unless I specifically request "help".

    Thank you,


    To which you replied:

    Wow!

    Chill out on the caffine.

    No worries, I'll make sure and avoid you.


    ---
    So, since I pegged you for the SPAMshit you are and made that crack
    about "Big help" (which I thought was warranted since you're supposed
    to be in the electronics biz and should have known where to send him
    for this direct "burrial" coax) you're now trying to to defend
    yourself with your stupid slurs? Keep it up, dumbass, I _love_ to
    pin back the ears of stupid shits like you in public.
     
  11. Rich Grise

    Rich Grise Guest

    Are you stuck with a bunch of coax cable or something? It's a terrible
    choice for this job. Go get a 100' spool of high-voltage wire at the
    TV repair shop - the kind they use for the anode lead. And put it
    in PVC pipe.

    Good Luck!
    Rich
     
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