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Old 06-05-2009, 01:55 PM   #1
 
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12-2 wire that is actualy 14-2


my father got some 12-2 house wire from Home Depot, checked the wire and it is actually 14-2 according to the wire striper and the coating is yellow instead of white, he asked the attendent and that is all they sell. we have done a lot of wiring, is there a new standard for the wire now, they all sell the smaller wire.
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Old 06-05-2009, 01:59 PM   #2
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All the 12-2 I have bought has a Yellow jacket. The 14-2 has a white jacket... Or did this used to be reversed over 5 years ago? You're just letting us know that according to your calibrated wire strippers you believe the core to be 14ga instead of said 12ga?
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Old 06-05-2009, 02:05 PM   #3
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Try a different stripper, or even measure its diameter. #12 has a diameter of 0.081", or just a little over 2 mm.
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Old 06-05-2009, 02:08 PM   #4
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How old are the wire strippers
Older wire (50's ?) was thicker then today
Yellow coating has never been on 14-2 as far as I know
I bought some over 10 years ago (?) & it had the yellow coat



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Old 06-05-2009, 02:20 PM   #5
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Quote:
Originally Posted by Mike Dolton View Post
my father got some 12-2 house wire from Home Depot
The jacket should also be marked with the gauge. If it says 12 then there is a 99.9999% chance you have 12 AWG wire (unless the factory made some giant dangerous mistake).
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Old 06-05-2009, 02:21 PM   #6
 
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is it 12-2 or 14-2


It has been a while sence I bought some, and I just checked, my 12-2 house wire is white jacket, and yes the wire striper set to 12 will not strip the new wire, it will on 14, and the wire we bought says 12-2 so it should not pull straight through when set on 12, So did the wire change over the last 5 years? just want to know because the gauge on the wire striper calls it 14-2 not 12-2 and there is a big difference when wiring and using 20amp breakers or higher. thanx for your help in this. I would just like to find out what is going on.
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Old 06-05-2009, 02:21 PM   #7
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Quote:
Originally Posted by ScottR View Post
(unless the factory made some giant dangerous mistake).
Can you imagine!
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Old 06-05-2009, 02:26 PM   #8
 
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Quote:
Originally Posted by Scuba_Dave View Post
How old are the wire strippers
Older wire (50's ?) was thicker then today
Yellow coating has never been on 14-2 as far as I know
I bought some over 10 years ago (?) & it had the yellow coat

bought in 2000
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Old 06-05-2009, 02:35 PM   #9
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Quote:
Originally Posted by Mike Dolton View Post
bought in 2000
Were they in the remainder bin??

I've got the opposite issue; the 12ga. hole works best for 14ga. My 14ga. jaws are too small! (Nicks the copper no matter how carefully I do it).
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Old 06-05-2009, 04:47 PM   #10
 
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Quote:
Originally Posted by InPhase277 View Post
Try a different stripper, or even measure its diameter. #12 has a diameter of 0.081", or just a little over 2 mm.
Wire
GaugeInchesMillimeters
0
0.3065
7.7851
1
0.283
7.1882
2
0.2625
6.6675
3
0.2437
6.19
4
0.2253
5.7226
5
0.207
5.2578
6
0.192
4.8768
7
0.177
4.4958
8
0.162
4.1148
9
0.1483
3.7668
10
0.135
3.429
11
0.1205
3.0607
12
0.1055
2.6797
13
0.0915
2.3241
14
0.08
2.032
15
0.072
1.8288
16
0.0625
1.5875
17
0.054
1.3716
18
0.0475
1.2065
19
0.041
1.0414
20
0.0348
0.8839
21
0.0317
0.8052
22
0.0286
0.7264
23
0.0258
0.6553
24
0.023
0.5842
25
0.0204
0.5182
26
0.0181
0.4597
27
0.0173
0.4394
28
0.0162
0.4115
29
0.015
0.381
30
0.014
0.3556
31
0.0132
0.3353
32
0.0128
0.3251
33
0.0118
0.2997
34
0.0104
0.2642
35
0.0095
0.2413
36
0.009
0.2286
37
0.0085
0.2159
38
0.008
0.2032
39
0.0075
0.1905
40
0.007
0.1778
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Old 06-05-2009, 05:41 PM   #11
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I don't know where that table comes from, but the number listed for #12 is off, I haven't checked the rest. The table from the NEC lists #12 as 0.081". My vernier calipers measure a piece of #12 as 0.0795", which is pretty close.
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Old 06-05-2009, 05:56 PM   #12
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Quote:
Originally Posted by Mike Dolton View Post
It has been a while sence I bought some, and I just checked, my 12-2 house wire is white jacket, and yes the wire striper set to 12 will not strip the new wire, it will on 14, and the wire we bought says 12-2 so it should not pull straight through when set on 12, So did the wire change over the last 5 years? just want to know because the gauge on the wire striper calls it 14-2 not 12-2 and there is a big difference when wiring and using 20amp breakers or higher. thanx for your help in this. I would just like to find out what is going on.
It's probably just a change in covering. The copper is easily guaged for accuracy.
There's a simple test to determine 12 from 14 guage, you just bend it. There's a distinct difference in stiffness between the two.
Ron
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Old 06-05-2009, 07:49 PM   #13
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I agree with Ron6519. It is more than likely the the jacket is thinner. Strippers should not come into contact with the wire, they cut through most of the jacket then rip the remaining part loose.
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Old 06-05-2009, 07:51 PM   #14
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Here's an AWG table http://www.powerstream.com/Wire_Size.htm
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Old 06-05-2009, 07:56 PM   #15
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Can you imagine the class action lawsuit if HD was selling mislabeled wire?
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