I'm not a nut that does everything with the power on--I kill any branch I'm working on and double and triple check with a non-contact voltage detector before I stick my fingers into anything (which saved my bacon the one time when the hot from a different branch of the same phase ended up connected to a neutral wire for a plug with no connected ground leaving it showing 0V on a multimeter in any configuration and still being live with the breaker off; that house was a mess). However our current dwelling has no main cut-off for the power. If we wanted to turn off power to the panel we'd need to get the power company out to pull the meter from the socket.
In a mostly full panel the bus bars are pretty much completely covered by the breakers anyway. You'd have to work pretty hard to come in contact with them. And the wires you're working with (besides the ground) are insulated anyway so no issue if they brush up against something.
The only thing that's _slightly_ butthole puckering is chasing the uninsulated ground wire through the panel down to the neutral bus.
And yeah, done without gloves because weighing "safety when I make a mistake" versus "greater dexterity so I'm much less likely to make a mistake" I prefer the latter. The protection is rubber soled shoes and keeping one hand tied behind my back so the electricity has no path through me.
Ha, that's nothing. I once watched a stubborn guy replace the bus bars in the input panel of a house. He did wear rubber gloves and boots and stand on a plastic stool. But, this is a kind of job where you are operating a socket wrench on the clamps holding down the bare ends of the thick direct-burial power cables, then wrestling the ends of the cable out of the way to unscrew and remove the bus-work from the panel chassis.
He did this without notifying the power company, so those supply lines were hot with 240V residential service. The weather shifted and a light mist started falling before he was done. Like another poster above, I was thinking I need to be ready to call 911, but wanting to be far enough away not to be hit by splattering metal or any surprise voltage gradients in the soil.
I accidentally replaced an outlet and added a switch to a circuit that was still energized. I had turned off the wrong breaker, and failed to confirm it before I started work.
But, careful work habits and some tools that happened to be insulated anyway, meant that I was never bridging two different potentials. The job went flawlessly and I only noticed when I plugged the outlet tester into it at the end, expecting to go turn the breaker on and come back and look at the lights... but the lights were already lit up.
I'm not a nut that does everything with the power on--I kill any branch I'm working on and double and triple check with a non-contact voltage detector before I stick my fingers into anything (which saved my bacon the one time when the hot from a different branch of the same phase ended up connected to a neutral wire for a plug with no connected ground leaving it showing 0V on a multimeter in any configuration and still being live with the breaker off; that house was a mess). However our current dwelling has no main cut-off for the power. If we wanted to turn off power to the panel we'd need to get the power company out to pull the meter from the socket.
In a mostly full panel the bus bars are pretty much completely covered by the breakers anyway. You'd have to work pretty hard to come in contact with them. And the wires you're working with (besides the ground) are insulated anyway so no issue if they brush up against something.
The only thing that's _slightly_ butthole puckering is chasing the uninsulated ground wire through the panel down to the neutral bus.
And yeah, done without gloves because weighing "safety when I make a mistake" versus "greater dexterity so I'm much less likely to make a mistake" I prefer the latter. The protection is rubber soled shoes and keeping one hand tied behind my back so the electricity has no path through me.