you can get clip on ferrite rings to go around and wires emmiting noise. You'll see them on things like your monitor cable if your using a pc, that inoccuous small cylinder thing on the cable part way along.
The're avalable from such places as maplins.
One word of warning. Earlyer this year i found out the hard way the current for electric horse fencing.........
(suddenly imagined a version of the film tron with 2 mares fencing with glowing foils
)
is notably stronger than that of pig fencing..........
(me and my imagination
)
Pig fencing would give you a bit of a start, the horse stuff
I was carrying a ladder between the fence and a thick crop of nasty stingy pointy weed,plant type stuff. My back side touched the fence and I couldnt stop my self from jumping into the nasty stuff. My bum cheek smarted from that for hours
(ok, stop that you lot it wasn't that funny) the next day I put on waterproofs, the hoist guys found my tale of woe tear jearking (with hysterics
)
Mind you the day went worse as i jumped over a barbed wire fence taking care not to injure myself further. trying to land on what looked like a bit of grass bridging a dyke. It was grassy on the top but it wasn't solid earth underneath. when my feet made contact they carried on going up to my knees. Horse field, a dyke filled with something which turns out to be soft warm and smelly
. Customer said "oh you can come in" "trust me on this one, you really don't want me to"