This is 12/3 NM-B non-metallic sheathed cable for residential indoor wiring. It is used in normally dry installations as branch circuits for outlets, lighting and other residential loads. Its applications are outlined in NEC 2008 and NEC 2011 Article 334.
Each conductor has color-coded PVC insulation with a nylon covering, meeting the required thickness of Type THHN. A 30 mil color-coded PVC sheath is applied over the completed assembly. Both the conductor insulation and the sheath are rated 90°C.
The cable is rated at 600 volts. It is rated at a conductor temperature of 90°C dry, but its ampacity is limited to 60°C under NEC 2008 and NEC 2011. It may be fished through masonry or tile walls where it is not exposed or subject to excessive moisture or dampness. The cable is lead free and RoHS compliant.
- Type
- NM-B non-metallic sheathed cable
- Conductor size
- #12 AWG
- Conductors
- 3
- Ground wire
- 12 AWG
- Voltage rating
- 600 volts
- Ampacity
- 20 Amps allowable
- Temperature rating
- 90°C conductor and sheath; ampacity limited to 60°C per NEC 2008 and 2011
- Insulation
- Color-coded PVC with nylon covering, Type THHN thickness
- Insulation thickness
- PVC 0.38 mm / 0.37 inches; nylon 0.100 mm / 0.004 inches
- Sheath
- 30 mil color-coded PVC
- Cable dimensions
- Nominal 8.6 mm x 0.37 inches
- Weight
- 0.107 lbs per foot
- Standards
- UL 83, UL 719, Federal Specification A-A-59544, NEC requirements; meets or exceeds applicable ASTM specifications
- Compliance
- Lead free, RoHS compliant
- Use
- Indoor residential, normally dry locations