Not continuous high voltage on fences by law??? what law?? All my electric fences are continuous (and I know that from personal experience) Pulsing ones are usually solar and battery powered and the pulses are to conserve battery power. As for sensing the voltage, it's true, sort of, I seen mine use their whiskers to touch the wire to see of it's hot. A pulsing fence fools them into thinking it not and then they lean into it just about the time a pulse comes along. ps don't stand near one as the resulting stampede can leave dusty hoof prints all over you. ps. if it's been raining, there are stories of flying cows and they are true, the reduced resistance can make a cow fly and won't leave hoof prints on you either. I now carry a grounding clip with me so anytime I get near one of those fences of mine it get clipped to ground, even if I "know" I turned it off. Those animals sure remember get touched by the fence, unlike humans (this especially), that can continue to forget that yes, that wire just behind you is hot, and back up one more stpe to be reminded. The air does turn blue from the high voltage corona expressed as four letter emissions.
- Bill Indecision may or may not be the problem. --- On Wed, 3/18/09, Kunde, Brian <[email protected]> wrote: From: Kunde, Brian <[email protected]> Subject: RE: Interesting Article To: "Conway, Patrick R (bNB Houston)" <[email protected]>, [email protected], "Doug Nix" <[email protected]> Cc: "[email protected]" <[email protected]> Date: Wednesday, March 18, 2009, 12:22 PM By law, electric fences cannot send out continuous current, but a high voltage pulse every second or two. This allows the animal to get hit and back away without the muscles contracting and trapping them against the fence. Some people say that cows can sense the high voltage in the fence, but I have seen cows get hit by the fence so I do not think that is true. They do have a good memory so once they know where the electric fence is (by touching it) they know to stay away. In fact, once cows learn where the electric fence is, you can turn off the electric without worrying about the cows getting out. We have had the fenser go down for weeks without the cows getting out. Pigs are the same way. We tried to load our pigs into a trailer by removing the electric fence and those pigs will not cross the fence line no matter what you do. The only way we could get the pigs into the trailer was to back the trailer into their pen, past the fence line, then the pigs climbed right in (pigs are very curious animals). We live within a few miles from a nuclear power plant and there are high voltage power line all over the place (closest ones about ½ mile from my house. I’m not aware of any problems with livestock in our area even though anytime someone in our town gets cancer they always try to blame it on the power plant and/or power lines. But that’s another Interesting Story. ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Conway, Patrick R (bNB Houston ) Sent: Wednesday, March 18, 2009 9:21 AM To: [email protected]; Doug Nix Cc: [email protected] Subject: RE: Interesting Article Many pastures have electric fences. Accepted theory was that these fences applied electric shock to the animal that touched the wire. But this study proves that the animal never really touches the fence. When they get near, they align parallel and never contact the fence. Patrick. From: [email protected] [mailto:[email protected]] On Behalf Of Cortland Richmond Sent: Wednesday, March 18, 2009 5:31 AM To: Doug Nix Cc: [email protected] Subject: Re: Interesting Article Blindfolds, maybe. Cortland ----- Original Message ----- From: Doug Nix <http://us.mc01g.mail.yahoo.com/mc/[email protected]> To: [email protected] <http://us.mc01g.mail.yahoo.com/mc/[email protected]> Cc: [email protected] <http://us.mc01g.mail.yahoo.com/mc/[email protected]> Sent: 3/17/2009 9:12:53 PM Subject: Re: Interesting Article Cortland, Interesting grant proposal. How would you plan to control for herd behaviour, since that may have direct influence on the cows desire to align themselves relative to each other... Doug [email protected] <http://us.mc01g.mail.yahoo.com/mc/[email protected]> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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