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The Pave 12-09-2012 11:38 AM

proper wire gauges
 
I am trying to install an extra outlet receptacle in a bedroom. I intend to wire from a receptacle at the end of the line and add a receptacle on the adjacent wall. When i opened the outlet, I noticed 14g wiring but when I went to kill the power, the outlet is on a 20 amp circuit. I thought it should be 12g on a 20 amp circuit. If so, how dangerous is this? If it is OK, should I use 12g on the new outlet or stay with the same 14g?

Hardway 12-09-2012 11:47 AM

To make it safe change the breaker to a 15amp or change the 14ga wire to all 12ga. You should not mix 14ga and 12ga on the same circuit. I am sure someone else will ad to this and or say if I am wrong!

stickboy1375 12-09-2012 12:52 PM

Quote:

Originally Posted by The Pave (Post 1069542)
I am trying to install an extra outlet receptacle in a bedroom. I intend to wire from a receptacle at the end of the line and add a receptacle on the adjacent wall. When i opened the outlet, I noticed 14g wiring but when I went to kill the power, the outlet is on a 20 amp circuit. I thought it should be 12g on a 20 amp circuit. If so, how dangerous is this? If it is OK, should I use 12g on the new outlet or stay with the same 14g?

change the breaker to 15 amps, use 14 AWG for your new receptacle.

TTW 12-09-2012 01:49 PM

It's ok to mix 12 and 14 gauge as long as the circuit breaker is 15 amps, the breaker needs to be sized for the smallest conductor.

Also, the wire in the panel should be labeled 15 amp circuit only.

plummen 12-09-2012 07:29 PM

Quote:

Originally Posted by TTW (Post 1069637)
It's ok to mix 12 and 14 gauge as long as the circuit breaker is 15 amps, the breaker needs to be sized for the smallest conductor.

Also, the wire in the panel should be labeled 15 amp circuit only.

And you've gotten an electrical inspector to pass mixing 14/2 and 12/2 on a circuit?
Only time I ever mix wire sizes is on whips to terminate lighting:wink:

Jim Port 12-09-2012 07:42 PM

Quote:

Originally Posted by plummen (Post 1069790)
Only time I ever mix wire sizes is on whips to terminate lighting:wink:

Care to cite the code that would allow this?

plummen 12-09-2012 07:50 PM

What do you use for whips when installing light fixtures?
I don't have code numbers memorized in my head like I used to but how about these 2?
410.117c and 240.5(B)(2)
those might have been revised ,but theyre the 2 that come to mind

plummen 12-09-2012 08:04 PM

1 Attachment(s)
lets see if this works:whistling2:

Missouri Bound 12-09-2012 08:37 PM

Quote:

Originally Posted by TTW (Post 1069637)
It's ok to mix 12 and 14 gauge as long as the circuit breaker is 15 amps, the breaker needs to be sized for the smallest conductor.


:eek:NO, it's not.:no:

k_buz 12-09-2012 09:15 PM

Quote:

Originally Posted by Missouri Bound (Post 1069829)
:eek:NO, it's not.:no:

Sure it is. It's not common practice, nor should it be, but it is perfectly legal.

plummen 12-09-2012 09:20 PM

When/where is it legal?

k_buz 12-09-2012 09:25 PM

As long as the circuit is fused for the smallest conductor, it is legal.

Hardway 12-09-2012 09:30 PM

Quote:

Originally Posted by Missouri Bound (Post 1069829)
:eek:NO, it's not.:no:

I don't a lot, but I know mixing wire gage is not allowed! Thanks Missouri Bound:-)

k_buz 12-09-2012 09:33 PM

Quote:

Originally Posted by Hardway (Post 1069878)
I don't a lot, but I know mixing wire gage is not allowed! Thanks Missouri Bound:-)

Then you are mistaken as well.

k_buz 12-09-2012 09:35 PM

Here's a perfect example...parking lot lights often leave the panel as 10's or even 8's, then half-way thru the circuit change to a smaller size wire. They might start out as 8's and end as 12's.


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