A couple weeks ago, I needed to shut a business down to add capacity to their electrical service. I arranged it to be late in the day, but once I got involved, I discovered it was an unexpected type of meter can and I can't turn off the power. So I have all the breakers off, no load, undo the load-side wires to the meter, live, and make it all up, also live, the last half hour by flashlight. There's enough power to incinerate me, but I know how to do my job well. I'm probably at greater risk from physical abuse of my body over decades, back and knees. Most jobs are less safe than programming.