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NM-B
Building wire

NM-B

Nonmetallic sheathed cable for residential dry-location wiring.

United States
Sizes, construction & electrical data
NM-B / TECHNICAL DATA

Sizes, construction & electrical data

Dimensional and electrical reference · Copper · 600 V

Conductor material
Copper (Cu)
Insulation material
PVC + nylon
Rated voltage
600 V
Maximum conductor temperature
90°C
Jacket / armour
PVC
Ampacity basis
2023 NEC Table 310.16; applicable correction and termination rules apply
Dimensional and electrical reference · Copper · 600 V
ConfigurationNominal area / conductormm²Conductor sizeAWG / kcmilInsulated conductorsStrands per conductorDiameter over bare conductormmInsulation wallmmDiameter over insulationmmBond / ground conductorNo. × AWGOuter jacket wallmmOverall dimensions / diametermmCopper weightkg/kmApproximate cable weightkg/kmMinimum bend radiusmmDC conductor resistance at 25°CΩ/kmAC resistance at 75°CΩ/kmInductive reactance at 60 HzΩ/kmReference ampacity, 60°C columnASelection
14/42.081144Solid1.6260.4062.3881 x 140.7628.8993.8142.935.568.63210.7120.1915
14/22.081142Solid1.6260.4062.3881 x 140.6359.449x4.4755.189.317.788.63210.7120.1915
14/32.081143Solid1.6260.4062.3881 x 140.63512.141x4.4774.412217.788.63210.7120.1915
12/43.309124Solid2.0570.4062.8191 x 120.76210.058148.8205.440.645.4536.7680.17720
12/23.309122Solid2.0570.4062.8191 x 120.63510.719x4.82687.812820.325.4536.7680.17720
12/33.309123Solid2.0570.4062.8191 x 120.63513.31x4.826117.6171.120.325.4536.7680.17720
10/45.261104Solid2.5910.5333.6071 x 100.76212.192230.730848.263.4124.2360.16430
10/25.261102Solid2.5910.5333.6071 x 100.63512.827x5.537136.918922.863.4124.2360.16430
10/35.261103Solid2.5910.5333.6071 x 100.63516.002x5.588183251.522.863.4124.2360.16430
8/38.3668373.6070.7875.1311 x 100.76214.859275.3386.958.422.1422.6570.17140
8/28.3668273.6070.7875.1311 x 100.76215.951x7.061197.9284.227.942.1422.6570.17140
6/313.3026374.5210.7876.0451 x 100.76217.069410.7543.268.581.3481.6730.16755
6/213.3026274.5210.7876.0451 x 100.76217.78x7.976287.2386.933.021.3481.6730.16755
4/321.1514375.7151.0677.7471 x 80.76221.438656.3857.286.360.8461.050.15770
2/333.6312377.1881.0679.221 x 80.76222.53998.61235.288.90.5310.6590.14895

Typical applications

Indoor outlets, switches and dedicated branch circuits.

Design advantages

Multiple insulated conductors and grounding wire in one sheath.

Selection notes

Dry locations only. Ampacity is limited to 60°C even with 90°C conductor insulation.

Standards to review

UL 719; NFPA 70 §334

Related cable families

TGS · VIETNAM

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