I would not advise doing that here in poland. Some people are dumb enough to put wires in the AC socket.
I happen to know a trick for checking if there is a current in a wire. You have to touch it with the back of your hand, the right one. Muscles contract and the arm will move away from the wire.
As specified a few times in this question (thanks @Michael Martinez), using the back of the hand is for safety. An electric shock can cause muscles to clench. If you place your hand around the wire and get shocked then you risk being unable to unclench your hand. Using the back of the hand, with the palm away from any wires, means that if a shock clenches your muscles then your hand and arm move away from the wires.
I have used it once, and it was indeed as described, my arm was in pain tho, for a few minutes.
But I dont advise on touching any wires, anywhere.