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-   -   Changing a breaker. Turn main power off first? (http://www.diychatroom.com/f18/changing-breaker-turn-main-power-off-first-123567/)

noone 11-15-2011 04:26 PM

Changing a breaker. Turn main power off first?
 
Silly question I know, but I saw a You Tube video where they change a breaker and they did not appear to switch off any main breaker of any sort.

They just turn the breaker they are changing off, and then unscrew the wires. It seems like those two wires would surely be HOT after you pull them out of the breaker.

Am I missing something here? Or are we just assuming that one will be careful inserting the hot wires into the new breaker?

http://www.youtube.com/watch?v=MRmPymLyEMk

Bud Cline 11-15-2011 04:30 PM

Now see, this is one of those posts that just makes me shake my head in wonderment. Why on earth would you not turn off the power when it is right there in front of you only inches from the breaker you intend to work on? Maybe I'm jumping the gun and there is a good reason for a novice to want to reach into a hot panel with a metal tool and mess around with the hot wires. If there is a justifiable reason, please let me in on it.:)

You Tube advice huh?:)

jbfan 11-15-2011 04:33 PM

Once the breaker has been turned off, the wires on the breaker are no longer hot.
I suggest all diy'ers turn off the main to do anything inside a panel.

noone 11-15-2011 04:33 PM

Quote:

Originally Posted by Bud Cline (Post 771911)
Now see, this is one of those posts that just makes me shake my head in wonderment. Why on earth would you not turn off the power when it is right there in front of you only inches from the breaker you intend to work on? Maybe I'm jumping the gun and there is a good reason for a novice to want to reach into a hot panel with a metal tool and mess around with the hot wires. If there is a justifiable reason, please let me in on it.:)

You Tube advice huh?:)

I watched the video twice thinking I maybe missed something.

Nope, he didn't ever turn off the main power. He just tests that the breaker was off, BEFORE he removes the wires from it. Uh, yeah, the breaker will surely be off once you switch it off. You don't need a sniffer to tell you that, you can just go try to turn a light on or something instead...

Or am I missing something here?

noone 11-15-2011 04:34 PM

Quote:

Originally Posted by jbfan (Post 771913)
Once the breaker has been turned off, the wires on the breaker are no longer hot.
I suggest all diy'ers turn off the main to do anything inside a panel.

Ok, then I am missing something here. How does turning the breaker off kill the power on the wires running into it?

Snav 11-15-2011 04:35 PM

So: trust a faulty breaker that I'm having to remove to actually cut off the power just because I tell it to?

No - If I'm changing it it's usually because it's not working right.

Bud Cline 11-15-2011 04:38 PM

Quote:

Ok, then I am missing something here. How does turning the breaker off kill the power on the wires running into it?
The source of the power comes from a bar in the panel behind the breaker. The wire is the outbound side of the breaker.

You know? On second thought maybe YOU shouldn't be anywhere near an electric panel for any reason.:)

noone 11-15-2011 04:40 PM

Quote:

Originally Posted by Bud Cline (Post 771922)
The source of the power comes from a bar in the panel behind the breaker. The wire is the outbound side of the breaker.

You know? On second thought maybe YOU shouldn't be anywhere near an electric panel for any reason.:)

For some reason I deducted that a breaker worked like a switch.



Silly me.


Still, seems like if you hit that bar with a screw driver you could fry yourself with the main power on, right?

jbfan 11-15-2011 04:43 PM

Quote:

Originally Posted by noone (Post 771925)
For some reason I deducted that a breaker worked like a switch.



Silly me.


Still, seems like if you hit that bar with a screw driver you could fry yourself with the main power on, right?

Yep!:yes:

Jim Port 11-15-2011 04:44 PM

Yes it would be possible to receive a shock while working in a panel, even with the main breaker off.

Bud Cline 11-15-2011 04:47 PM

Quote:

Still, seems like if you hit that bar with a screw driver you could fry yourself with the main power on, right?
Think: "Crispy Critter".:eek:

Bud Cline 11-15-2011 04:49 PM

Quote:

For some reason I deducted that a breaker worked like a switch.

Actually it does.:yes:

noone 11-15-2011 04:52 PM

Quote:

Originally Posted by Bud Cline (Post 771938)
Actually it does.:yes:

I just didn't realize it was the bar behind it powering it. I thought stupidly that one wire was input, the other was output....... over complicating things.

Bud Cline 11-15-2011 04:55 PM

Whatever you do...
Don't try to lick that bar with your tongue.:no:

noone 11-15-2011 05:03 PM

Quote:

Originally Posted by Bud Cline (Post 771945)
Whatever you do...
Don't try to lick that bar with your tongue.:no:


I thought you had to lick the bar right before you insert the new breaker?? :thumbsup:


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