Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-01-2009, 06:33   #1
Registered User
 
bmartinsen's Avatar

Join Date: Dec 2007
Location: Grand Cayman
Boat: Lavranos 39 S/v Continental Drift
Posts: 88
Electric/cattle fences has anyone used one?

I looked into doing this about 7yrs back but was always undecided as to what might happen to onboard electronics with 7000volts going around. I know it would be hard to insulate from the rest of the boat. example:What happens when unlucky person grabs backstay(ssb ant) and hotwire? or any other metal bit thats grounded back to the batteries, etc..

Anyone actually using one ?
__________________

__________________
bmartinsen is offline   Reply With Quote
Old 24-01-2009, 06:57   #2
Registered User

Join Date: Sep 2007
Posts: 298
Quote:
Originally Posted by bmartinsen View Post
I looked into doing this about 7yrs back but was always undecided as to what might happen to onboard electronics with 7000volts going around. I know it would be hard to insulate from the rest of the boat. example:What happens when unlucky person grabs backstay(ssb ant) and hotwire? or any other metal bit thats grounded back to the batteries, etc..

Anyone actually using one ?
I am familiar with fence chargers and have an old one in the garage, but just never considered running cattle on my boat. What did you have in mind?
__________________

__________________
TexSail is offline   Reply With Quote
Old 24-01-2009, 07:23   #3
Senior Cruiser

Cruisers Forum Supporter

Join Date: Nov 2005
Location: Out there doin' it
Boat: 47' Olympic Adventure
Posts: 2,637
I'm guessing you mean to stop intruders - there is a commercial product that is specifically designed to do that, but iirc it is expensive. As far as I could tell, it uses non-conductive stanchions mounted outwards (horizontally) from the base of the guard rails. You could probably cobble together a workable solution, but am unsure if regular electric fencing would stand up to the salt-water environment.
__________________
Lodesman is offline   Reply With Quote
Old 24-01-2009, 07:38   #4
Registered User

Join Date: Sep 2007
Posts: 298
I was just joking with you about the cattle. To be effective, the hot conductor has to be very well insulated and the shockee has to be grounded and the unit has to be grounded. I would personally not use a fence charger on a boat for fear that the electronics would be damaged or that the salt water might cause the wrong folks to get zapped. JMHO.
__________________
TexSail is offline   Reply With Quote
Old 24-01-2009, 10:53   #5
Registered User
 
donw_s11's Avatar

Join Date: Apr 2007
Location: Austin, TX, USA
Boat: Irwin Citation 38
Posts: 40
radio interference...

Something no one else mentioned is that a fencer would make an annoying bzz...bzz...bzz...bzz... on every VHF channel. I grew up on a farm in Kansas, and had the task of maintaining our electric fences. I can still hear the radio noise 35 years later...

Don W.
__________________
donw_s11 is offline   Reply With Quote
Old 24-01-2009, 11:10   #6
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,152
Why do you want to do this? I use an electric fence to keep dogs, cats, raccoons and other pests from tearing up or crapping in my garden.

There are a few real easy ways for a human to defeat an electric fence. I wont say how so as not to give the bad guys any advantage. Becoming more aware of your environment is the best defense.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Old 24-01-2009, 11:19   #7
CF Adviser
 
Bash's Avatar

Cruisers Forum Supporter

Join Date: Dec 2008
Location: sausalito
Boat: 14 meter sloop
Posts: 7,260
it's about time we all get more serious about defending...

...against cattle stampedes in remote anchorages.
__________________
cruising is entirely about showing up--in boat shoes.
Bash is offline   Reply With Quote
Old 24-01-2009, 14:31   #8
Long Range Cruiser
 
MarkJ's Avatar

Cruisers Forum Supporter

Join Date: Dec 2007
Location: Australian living on "Sea Life" currently in England.
Boat: Beneteau 393 "Sea Life"
Posts: 12,828
Images: 25
An electric fence is an excellent and reasonable idea. Its fast to put up, say 2 minutes before you go to bed - maybe just across the companionway. The shockee does NOT need to be grounded. Cattle don't have to have their feet in the water and their toeseys are insulated.
Now about the idea that the intruder will decide on revenge. Obviously you ain't never been hit!

I was on my mates farm and he had a 12 volt battery in the shed attached to a trickle charger that he only plugged in once a week. Later when we jumped over a fence I put my hand out and accidentally hit it with the back of my hand. It was a unique feeling of being spanked very very had on the wrist. My elbow joint held some pain for about 10 minutes and I wouldn’t have been punching anyone.

The shock of the shock put me right out of the action for quite a few minutes.

You sure as hell remember where the wire is next time!!!!!

If I was intent on robbing someone and jumped on their boat at night and got a shock the first thing I would be doing is getting off the boat pronto!

Considering these things are so cheap and set up for portability and run on 12 v then its a great one for a boat!

The other point about injuring your robber (like I would give a damn?) is that thieves tend to be fit young men not old guys with a third heart bypass. so a big jolt aint gunna be hurting for more than a few moments.


__________________
Notes on a Circumnavigation.
OurLifeAtSea.com

Somalia Pirates and our Convoy
MarkJ is offline   Reply With Quote
Old 27-01-2009, 19:58   #9
Registered User
 
twisty's Avatar

Join Date: Jan 2009
Posts: 203
It would work(ask my son about the electric fence we used to keep the bull in that jumped up and caught him square across the chest when he was 5)

ok it would work in theory but damn there has to be a better way!
__________________
twisty is offline   Reply With Quote
Old 27-01-2009, 20:04   #10
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
Quote:
OK it would work in theory but damn there has to be a better way!
A keep out sign comes to mind. Out smarting cattle is not a big leap up the food chain.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 27-01-2009, 20:19   #11
Registered User
 
twisty's Avatar

Join Date: Jan 2009
Posts: 203
Quote:
Originally Posted by Pblais View Post
A keep out sign comes to mind. Out smarting cattle is not a big leap up the food chain.
You didn't know our bull, I often thought he was smarter than we were.
__________________
twisty is offline   Reply With Quote
Old 27-01-2009, 20:40   #12
Moderator Emeritus
 
Pblais's Avatar

Join Date: Mar 2003
Location: Hayes, VA
Boat: Gozzard 36
Posts: 8,700
Images: 15
Send a message via Skype™ to Pblais
Quote:
You didn't know our bull, I often thought he was smarter than we were.
When all you do all day is try to escape it could seem like that. Most cattle that do escape are not headed for a boat to make a clean get away.
__________________
Paul Blais
s/v Bright Eyes Gozzard 36
37 15.7 N 76 28.9 W
Pblais is offline   Reply With Quote
Old 27-01-2009, 22:43   #13
Registered User
 
Stillraining's Avatar

Join Date: Oct 2008
Location: Puget Sound
Boat: Irwin 41 CC Ketch
Posts: 2,876
I'v got 2 miles of electric fence around my place..I dont know what kind of fence chargers or what kind of laws of physic you boys run down there but if you aint grounded here you wont get shocked..My fence is almost worthless by august due to dry ground resulting in poor grounding.
__________________
"Go simple, go large!".

Relationships are everything to me...everything else in life is just a tool to enhance them.
Stillraining is offline   Reply With Quote
Old 27-01-2009, 23:51   #14
Registered User
 
Celestialsailor's Avatar

Join Date: Nov 2006
Location: In Mexico, working on the boat
Boat: Hallberg Rassy 35. and 14ft.Whitehall pulling skiff.
Posts: 8,013
Images: 5
What ever you do, if you turn it on before you sleep...Please remember to turn it off when you awake. Touch that first thing in the morning and you won't need your coffee to wake you up...
__________________
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well-preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming: Wow - what a ride!"

http://wwwjolielle.blogspot.com/
Celestialsailor is offline   Reply With Quote
Old 28-01-2009, 00:08   #15
Registered User
 
BadFish's Avatar

Join Date: Jan 2009
Location: Pittsburgh, PA
Boat: 1989 Carver Santego 3067 - BADFISH
Posts: 220
Images: 13
Send a message via AIM to BadFish
IMHO...

This is a stupid idea. I've had some bad ones in my day, but never purposely surrounded myself with an electrically charged object.

If you're that concerned with security, use a practical idea, like a heavy duty lock. If you need personal safety while aboard, get a dog and/or a gun.

Cheers

Bill
__________________

__________________
Q: "How do you stay fit?"
A: "Passing the vodka bottle and playing guitar." - Keith Richards
BadFish is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric Outboard JohnnyC Auxiliary Equipment & Dinghy 23 28-02-2010 06:01
Electric Outboards Jackstee Multihull Sailboats 1 23-08-2008 10:44
Electric motors klevalt Multihull Sailboats 59 30-07-2008 11:27
Going Electric olivertwist Propellers & Drive Systems 0 08-05-2008 18:31



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 23:52.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.