Dont do it in bare feet Dave ,Probably wired up to house mains :!:
Bob
No I trust him, seeing as he's a retired Methodist Minister!
I've never tried this method myself, so I can't speak from experience, but I've lifted this from the BBC's website:
*****************************************
Copper
When slugs make contact with copper, a toxic reaction occurs between the copper and the slime creating an electric current, and they get an electric shock which repels them. The benefits are that it works wet or dry, is very effective, and doesn't kill the slug. The copper must be at least 2" thick, preferably 3" to be a real deterrent. It can be bought as adhesive tape, or strips. Bury it in the ground a couple of inches to prevent them crawling under it, and bend the strips so the edge sticks out at an angle. This will help to put off the more determined slugs who are willing to put up with the discomfort. Copper can lose strength over time, so go over it with sandpaper from time to time.
The drawbacks are that it can be expensive, so use it sparingly, perhaps on containers, rather than the borders. The edges can be sharp, so keep away from where children play. If the plants overhang the copper strips, and touch other plants or the ground, this will act as a bridge, and slugs will climb straight over. Make sure that there are no slugs inside the area you are protecting, otherwise you are trapping them in with your plants.
Gardening tools are also available in copper. These have been said to have a beneficial effect on keeping slugs away from plants.
**************************************************
(I think when they say 2" or 3" thick - they mean wide, especially when they go on to talk about it in terms of tape!)