On Wed, 20 Jan 2016 12:33:40 -0500, Micky
wrote:

On Wed, 20 Jan 2016 07:28:24 -0800 (PST), TimR
wrote:

On Wednesday, January 20, 2016 at 8:12:36 AM UTC-5, Micky wrote:
If he's going to do this he should turn off all the power to the
breaker box by flipping the main breaker at the top, and use a
flashlight to see. Or at the verrry least he should keep one hand in
=========

his pocket, literally, so he can't touch things with two hands and get
killed, literally.

First turn off the breaker in question.

Then when the breaker is off, unscrew the screw that holds the wire at
the end of the breaker that's not in the middle of the box. Probably
don't have to unscrew it all the way. You don't want the screw

The OP doesn't know anything about a panel and you've left out an important step that will confuse him.

After you've turned off the main breaker, you can't see the screws or the wires.

That's what the flashlight is for. :-)

There is a safety shield in place. That must be removed, carefully.

And remember, with the main breaker turned off, there is no power to the buss bars, BUT there still is lethal current available up top.

Hmmm. I haven't seen it for years, but in mine I didn't think the
power was very available. I'd have to stick my fingers more than 2"
down between the main breaker and the top of the box and even then,
the cable that was showing was insulated. Maybe if I bent my finger I
could get to part where the insulation was off. Anyhow, OP, don't do
that.
I don't know about in the USA, but in Canada the main breaker has to
be protected by a sheild that does not come off when the main panel
cover is removed and NOTHING is alowed to be "live" in the main panel
area with the main disconnect (main breaker) disconnected (turned off)
With the main breaker off you would need to be VERY inventive to find
a way to electrocute yourself.

This is, of course, assuming it is a relatively current panel.