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Old 03-05-2013, 04:49 PM   #1
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15 amp to 20 amp with 12 gauge wire


I would like to change a breaker from 15 amp to 20 amp we have 12 gauge wire throughout besides possible changing the receptacle to 20 amp do you for see any problems

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Old 03-05-2013, 04:58 PM   #2
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by scaponio View Post
I would like to change a breaker from 15 amp to 20 amp we have 12 gauge wire throughout besides possible changing the receptacle to 20 amp do you for see any problems
15 amp receptacles are allowed on a 20 amp circuit, and I dont see any issues as long as the entire circuit consist of 12AWG wire or larger...

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Old 03-05-2013, 05:14 PM   #3
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by scaponio View Post

I would like to change a breaker from 15 amp to 20 amp
...we have 12 gauge wire throughout

Do you know WHY the previous electrician (or DIY'er) may have used a 15A breaker where one shouldn't be required? You should investigate that before assuming it was just an "oh, why not" or "all I have is this 15 and don't wanna run to the store" situation.
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Old 03-05-2013, 05:16 PM   #4
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by TarheelTerp View Post
Do you know WHY the previous electrician (or DIY'er) may have used a 15A breaker where one shouldn't be required? You should investigate that before assuming it was just an "oh, why not" or "all I have is this 15 and don't wanna run to the store" situation.
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Could have been simply for voltage drop...
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Old 03-05-2013, 05:50 PM   #5
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15 amp to 20 amp with 12 gauge wire


You can change it if you want, 15 amp outlets are fine on a 20 amp circuit.
Just make sure there is no 14 awg wiring anywhere on this circuit.
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Old 03-05-2013, 06:34 PM   #6
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15 amp to 20 amp with 12 gauge wire


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Could have been simply for voltage drop...
"could be" a lot of things.

tapping into it for some lighting then run with 14/2 is another common situation.
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Old 03-05-2013, 06:43 PM   #7
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by TarheelTerp View Post
"could be" a lot of things.

tapping into it for some lighting then run with 14/2 is another common situation.
I wouldn't lose any sleep over it if it did exist, 14 AWG is good for 20 amps...
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Old 03-05-2013, 08:37 PM   #8
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by stickboy1375 View Post
I wouldn't lose any sleep over it if it did exist, 14 AWG is good for 20 amps...

Stick-

I respect your opinions and advice here. But saying this, in this forum, is irresponsible. #14 is NOT rated for 20A except in very specific limited applications. As you know, branch circuits for general lighting and receptacles is NOT one of those exceptions.
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Old 03-05-2013, 08:42 PM   #9
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15 amp to 20 amp with 12 gauge wire


I saw somebody hook up a back porch ceiling fan once with doorbell wire. He said "it may get a little warm sometimes but it'll be alright"
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Old 03-05-2013, 11:07 PM   #10
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15 amp to 20 amp with 12 gauge wire


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I wouldn't lose any sleep over it if it did exist, 14 AWG is good for 20 amps...
Now Stick, earlier you said a #14 pigtail to a #12 violated Code, and of course, I agree, but now you're not worrying much?

Given the absence of a heating or derating factor, I would worry more about the possibility of a 20' run of a group of #14s mixed with #12s than I would a 6" pigtail.

You are correct, that in the 60 degree column of Table 310.16, #14 can handle 20-amps. I'm curious as to why the NEC doesn't label ROMEX in that table.
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Old 03-05-2013, 11:46 PM   #11
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15 amp to 20 amp with 12 gauge wire


I made a mistake; it was 12 gauge I was hoping to see. There are two 20 amp breakers on circuits that consist of 14 gauge wiring for our bedrooms, not the kitchen. My fault for rushing it off. But the question is:

when putting on the breaker, is it obvious the gauge of the wiring it is protecting?
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Old 03-05-2013, 11:57 PM   #12
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by adlermark321 View Post
I made a mistake; it was 12 gauge I was hoping to see. There are two 20 amp breakers on circuits that consist of 14 gauge wiring for our bedrooms, not the kitchen. My fault for rushing it off. But the question is:

when putting on the breaker, is it obvious the gauge of the wiring it is protecting?
Are you in the wrong thread? I don't see a previous post from you in this thread.

To answer your question, the sheathing on 12AWG cable is usually yellow, while 14 is white, assuming it's newer cable. If you think #14 is running to that breaker, you need to put a 15amp breaker in there.

I hope this answers your question?
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Old 03-06-2013, 12:32 AM   #13
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by sirsparksalot View Post
Are you in the wrong thread? I don't see a previous post from you in this thread.

To answer your question, the sheathing on 12AWG cable is usually yellow, while 14 is white, assuming it's newer cable. If you think #14 is running to that breaker, you need to put a 15amp breaker in there.

I hope this answers your question?
I am new member of this forums, I m getting some problem in posting new thread, thats y i have asked my question in this thread.

Anyways sirsparksalot Thanks for the answers.
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Old 03-06-2013, 09:46 AM   #14
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15 amp to 20 amp with 12 gauge wire


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Originally Posted by adlermark321 View Post
There are two 20 amp breakers on circuits that consist of 14 gauge wiring
If you know this to be true you must remedy this error promptly

Quote:
...when putting on the breaker, is it obvious the gauge of the wiring it is protecting?
If you know what you're looking for it should be obvious.
(14 ga wire is smaller/lighter that 12 ga wire)

About 2001 they began using different colors for the sheathing to help but if the house or work is older than that you can't count on color.

The ONLY true way is to touch the several (insulated) wires...
and ideally to use a gauge of some sort on the uninsulated wire.
The several indents on the front of your stripper will be fine.

Last edited by TarheelTerp; 03-06-2013 at 09:53 AM.
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Old 03-06-2013, 05:51 PM   #15
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15 amp to 20 amp with 12 gauge wire


I know my statement might have ruffled some feathers, but in all honesty, lets look at the facts and why I even made the statement to begin with...

First off, #14 AWG is good for 20 amps, there is no denying that fact, the issue is that the NEC will max it out at 15 amps, why, I have no idea.... but in the OP's scenario, i wouldn't lose any sleep if there was a small section of 14 AWG included in the 20 amp protected circuit....

Simply because your house is not going to burn down, the wire isn't going to melt and there is no danger, the only issue is that you are violating a NEC code.... with that said, I would not knowingly violate the NEC for this sake alone.... just my 2 cents, take it or leave it.

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