What is 12-2G NM-B Yellow Cable?
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What is 12-2G NM-B Yellow Cable?
Crew...
I'm running new 20 amp circuits for a bathroom renovation...sent my step-son to Lowes for 12-2 Romex; & he comes back with yellow cable (the package is labeled 12-2G Type NM-B.)
I haven't done any wiring in years...so...is this something new?
Can I use it for typical interior 20 amp appliance circuits?
Thanks,
mark4man
I'm running new 20 amp circuits for a bathroom renovation...sent my step-son to Lowes for 12-2 Romex; & he comes back with yellow cable (the package is labeled 12-2G Type NM-B.)
I haven't done any wiring in years...so...is this something new?
Can I use it for typical interior 20 amp appliance circuits?
Thanks,
mark4man
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That's exactly what you want for a 20A circuit.
"Romex" is a brand name, but is what most people call type NM cable. NM-B is 90 degree C wire, as opposed to older NM which was only rated 60 degree C. Lately the manufacturers have been color coding the cable. All I've seen has been white for 14 guage, yellow for 12 guage, and orange for 10 guage. These colors are not code though, so don't assume a color corresponds to a particular guage.
Are you up on current code for bathroom circuits?
"Romex" is a brand name, but is what most people call type NM cable. NM-B is 90 degree C wire, as opposed to older NM which was only rated 60 degree C. Lately the manufacturers have been color coding the cable. All I've seen has been white for 14 guage, yellow for 12 guage, and orange for 10 guage. These colors are not code though, so don't assume a color corresponds to a particular guage.
Are you up on current code for bathroom circuits?
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The G means Ground, indicating the cable has a ground wire as well as the 2 conducsors. NM means non-metallic, and thr B is the temperature rating of the cable.
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I think this is pretty new, because I'd never seen it before until recently when I had to buy some wire for a project. As it was explained to me, the cables are color coded to make it easier for the inspector to see that the correct sizes have been used. The colors of what I got are the same as chirkware said.
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Color coded cable are at least three years old, and is mainly for the installer's benefit. Color coding is not mandated by the NEC and colors could vary by cable manufacturer, so the inspector must still examine the cable.
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Thanks everybody...
Very good info.
There will be two circuits...one dedicated to a jacuzzi tub (> faceless GFI)...(tub motor lug grounded to cold water feed); & the other to the standard GFI's & lighting/switching. Both will be 20 amp. Is there anything else?
Thanks,
mark4man
Very good info.
Are you up on current code for bathroom circuits?
Thanks,
mark4man
#9
Although a number of types of cable and wire is rated for 75-degrees (e.g., RHW, THHW, THWN, USE, ZW, RHW, THW, XHHW, UF), it was not commonly used indoors for residential dwellings.