I once, as a boy in matric, worked with just such a "suicide cable" and very nearly lost my life! I had one end plugged in inside the house and started coiling the other end - was barefoot to boot - and just as I entered at the kitchen door, all three the points on the plug in my hand made contact with my palm. What switched off the power by the grace of God I am not clear on to this day, but it saved my life. Still have the markings in my right palm, 52 years later. So heed that warning.