Here's a comment from someone at a web post:
"Is it AC or DC? if it’s AC, then all they’d have to do is clip an alligator clip to one side 9hot side) and they’d get free electricity, probably 240 V since its Europe. So, 240 V phase to ground.
On the other hand it could be 2 phases, but that would be still be 240 V AC phase-to-phase (in a Delta arrangement).
Or it could be a 120/208 three phase configuration and that means it would provide 208 phase-to-phase, or 120 V phase-to-ground.
It would be simple to check: Simply place one lead from the wires of a light bulb into earth ground, and then attach the other lead to either wire on the fence;
if EITHER wires lights the bulb, they are both hot (two phases); if only one wire causes the light bulb to light, then it’s likely that one wire is hot and the other is ground.
A third alternative would be Direct Current but that is highly unlikely because with DC, you can’t let go since it doesn’t go through 0 as the sine wave changes from positive to negative. (if you got shocked with AC you are only able to let go when the voltage reaches 0 degrees, i.e., neither negative nor positive).
So someone touching a hot Direct Current line would simply sit and there and burn up, until either their body burned through, or the power supply somehow provided an open circuit.
How much current it’s supplying is the determining factor, but with either 240 V AC or 240 V DC it would only take about 15 milliamps crossing your heart for a short time, maybe less than 30 seconds to stop your heart."
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