... I was using a Progressive Electronics 77HP tones to find which cable I was working with. I forgot that the toner was still on the cable when I energized the cable....
Rcaman
I am not an electrician, but it seems inherently dangerous to make a circuit ‘live’ with the ends exposed.
I don’t know how many times I have opened a ceiling tile to discover exposed wires from M/C and open junction boxes. I tag the tile with painters tape, so the next person on the crew is aware of the danger, and inform the MFIC.