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Old 04-03-2011, 06:54 PM   #1
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Yellow Jacket Romex


Is the yellow jacket Romex only used with 20 ga. wire?
Does anyone know what year (approximate) the yelow jacket was first used in the U.S.?

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Old 04-03-2011, 07:00 PM   #2
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Yellow Jacket Romex


it is the color commonly used with 12 awg but there is no code so it is not a reliable means to determine the gage.

no idea when it started but since it is not a code requirement, it likely started with one manufacturer and was eventually picked up by all the major producers. That could have taken any number of years before the followers finally started doing it.

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Old 04-03-2011, 08:35 PM   #3
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Yellow Jacket Romex


Yes, to what Nap replied. But do now rely on color coding of the exterior sheathing of "Romex" (a brand name anyway) to determine the gauge of wiring. READ what is imprinted on the outer jacket, read it twice.
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Old 04-03-2011, 08:59 PM   #4
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Yup, it's printed all up and down the wire! (although that old black wire can be real hard to read when it's too old....)

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Old 04-03-2011, 09:11 PM   #5
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Yellow Jacket Romex


About 2002 is when I started seeing yellow 12/2 NM.
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Old 04-03-2011, 11:40 PM   #6
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Yellow Jacket Romex


Found a 250' roll of white jacketed 12/2 in my shop the other day. Had to do a double take to make sure it was 12/2. But yeah, it was in the early 2000s when they started that I think.
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Old 04-03-2011, 11:46 PM   #7
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Yellow Jacket Romex


did that have an undersized ground conductor?
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Old 04-04-2011, 12:24 AM   #8
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Quote:
Originally Posted by nap View Post
did that have an undersized ground conductor?
You know, I'm not sure, will have to look.

Nope, just looked and it's the same size. Would have been purchased around 1999, probably, when I added lights to the closets in a house I owned at the time.

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Old 04-04-2011, 12:24 AM   #9
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Yellow Jacket Romex


Undersized grounding conductors are found in very OLD NM cables, dating back to before the 1971 NEC went into effect.

In Canada, their type NM-D cable still utilizes undersized grounding conductors ... a #14 ground is present in a #12 cable.
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Old 04-04-2011, 06:54 AM   #10
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Yellow Jacket Romex


I found/have/had some of that (with hard to read black sheathing.) I DID re-use some at the end of my wiring job here on 2 short switch runs, but I stripped out extra white and spray-painted it green and ran that as a ground to make sure the inspector did not fail me. He allowed it.

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