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

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

I've removed panels, but rarely. Big aluminum wires.
Really big. Bare wire.

Thicker than a garden hose (110Amp service).
Makes your breathing go up a notch just looking at them.

Even so, I've replaced a breaker (220VAC house panel for a
built-in AC which had it's own separate breaker at the AC unit)
- but only once.

So, advice is handy.
I will read it all.