You're pulling cable through a ceiling grid on a gut renovation in Midtown Manhattan when your fish tape brushes an energized 480-volt feeder that was supposed to be locked out. There's a flash, your arm goes rigid, and you're thrown off the ladder. At the hospital, the entry wound on your hand looks small — a burn the size of a quarter. But electrocution injuries on NYC construction sites are iceberg injuries: the visible mark is a fraction of the damage. The current that en