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#107247 - 10/30/04 05:00 PM Electric Fence  
Admin  Offline

Administrator
Member
Joined: Oct 2000
Posts: 3,439
NY, USA
(submitted via Joe Tedesco)
Quote
here's one that really concerned myself and my partner. This guy had cut the end off a 50' extension cord and attached it to a chain link fence by wrapping the wires around the bottom of the fence and covering the cord and connection to the fence with dry leaves. The photo is not very clear, but I think you can make it out. This was to keep his dogs in the yard.


Brian M Richardson
Deputy Building Commissioner
City Of Shelbyville
[Linked Image]


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#107248 - 10/31/04 06:26 AM Re: Electric Fence  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Lucky he did not kill neighborhood kids.

What a stupid ignorant $*(*&^%#!


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#107249 - 10/31/04 08:58 AM Re: Electric Fence  
CharlieE  Offline
Member
Joined: Apr 2004
Posts: 200
Indianapolis
Bob, there is a difference between stupid and ignorant. I am ignorant of a lot of subjects but I suspect he is indeed both. [Linked Image]

- - - - - - - - - - - - - - - - - - - - - - - - - - -
Charlie Eldridge, Indianapolis, Utility Power Guy


Charlie Eldridge, Indianapolis Utility Power Guy

#107250 - 10/31/04 09:33 AM Re: Electric Fence  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Point taken. [Linked Image]

What a stupid and ignorant $*(*&^%#!


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#107251 - 10/31/04 12:57 PM Re: Electric Fence  
SvenNYC  Offline
Member
Joined: Aug 2002
Posts: 1,691
New York City
I honestly can't see how that would work....

IF that dude plugged the other end of the extension cord into a light socket, it would have made a nice show of fireworks!


#107252 - 10/31/04 01:05 PM Re: Electric Fence  
iwire  Offline
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Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
Sven nice to see you around again.

As long as the fence is only in contact with the earth it would be very easy for this to liven it up to 120 volts and there would be no sparks.

Walk up to it and touch and get a good blast, the worst place to touch this fence would be right in the center of the span between two of the fence posts.

If you stand right at a fence post you will be closer to the same potential as the fence but not quite the same.

That is is you did not get a shock form one foot to the other as you walked up to the fence post.

Bob


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#107253 - 10/31/04 02:33 PM Re: Electric Fence  
electure  Offline


Member
Joined: Dec 2000
Posts: 4,259
Fullerton, CA USA
Are there any charges being filed ??

Much the same type of setup was the cause of

THIS

What isn't mentioned in this particular article is that the "fence" was actually a wire strung intentionally around the pool by a caretaker, who ran it to house current.
It was put in to stop the dogs from peeing in the pool.
The son fell into the pool after hitting the wire. His father, arriving later, saw him face down, jumped in, and was electrocuted.
A third family member was injured badly when he tried to retrieve the other 2, but was saved when his wife pulled the wire out of the pool with a rubber sandal.

A real tragedy


Sometimes stupidity and ignorance should be rewarded with prison time [Linked Image]


#107254 - 11/01/04 09:41 PM Re: Electric Fence  
John Steinke  Offline
Member
Joined: Apr 2001
Posts: 518
Reno,Nv., USA
It's not even a very effective fence- ever notice how the commercial models change the voltage and frequency, as well as limit the amps?


#107255 - 11/04/04 11:39 AM Re: Electric Fence  
chimo  Offline
Member
Joined: Oct 2004
Posts: 16
I don’t understand this (besides it being stupid). It looks like the hot is connected to the fence, and the other conductors are cut off. If you plugged this in, wouldn’t the breaker trip? If the neutral were connected as well (not sure), I would think the breaker would trip immediately. If someone touched the fence (let’s say in bare feet), don’t you think the human would have a higher resistance than the fence’s connection to ground, and not get shocked?

While we’re on the subject of stupidity, I had an idea for keeping intruders off of my suspended deck, but not sure if it would work. If I ran a conductor around the base of my deck, suspended from insolated poles, and connected it to one of those electronic fences for dogs, would an intruder who climbs the deck and touches the wire get zapped? Keep in mind he would be standing on the wooden deck- I can’t see how he would be grounded to complete the circuit. What am I missing?


#107256 - 11/04/04 05:01 PM Re: Electric Fence  
pauluk  Offline
Member
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Quote
If you plugged this in, wouldn’t the breaker trip?

Not unless the resistance to ground through the fence is low enough to result in a high enough current, and that's very unlikely (unless the breaker was a GFI type).

Quote
If someone touched the fence (let’s say in bare feet), don’t you think the human would have a higher resistance than the fence’s connection to ground, and not get shocked?

Both the resistance of the fence to ground and the resistance of the person to ground will both be much higher than the source impedance of supply.

Even if the resistance to ground on the fence was low enough to result in several amps of fault current, the fence would still be at 120V to ground, so the person would still be shocked.



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