NM-B (Inside)

Commonly referred to as “Romex” cable, this type of electrical wire (Non-Metallic Sheathed Cable) may be used for both exposed and concealed work in normally dry locations at temperatures not to exceed 90°C (with ampacity limited to that for 60°C conductors), as specified in by the National Electric Code (NEC).

NM-B cable is primarily used in residential wiring as branch circuits for outlets, switches, and other loads. NM-B cable may be run in air voids of masonry block or tile walls where such walls are not subject to excessive moisture or dampness.

Voltage rating for NM-B cable is 600 volts.

Type NM-B Manufacturer’s Specification Sheet.

Type NM-B Wire Composition and Sample Uses.

Showing all 12 results

  • 14-2-NM

    14/2 NM-B (15 Amps)

    $13.01 – $122.28     Select options
    $13.01 – $122.28
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 14-3-NM-B

    14/3 NM-B, Southwire
    (15 Amps)

    $14.55 – $150.73     Select options
    $14.55 – $150.73
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 12-2-NM

    12/2 NM-B (20 Amps)

    $16.28 – $189.59     Select options
    $16.28 – $189.59
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 12-3-NM-B

    12/3 NM-B, Southwire
    (20 Amps)

    $18.82 – $246.88     Select options
    $18.82 – $246.88
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • Sale! 10-2-NM

    10/2 NM-B (30 Amps)

    $21.21 – $300.46     Select options
    $21.21 – $300.46
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 10-3-NM-B

    10/3 NM-B, Southwire
    (30 Amps)

    $25.82 – $406.75     Select options
    $25.82 – $406.75
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 8-2-NM

    8/2 NM-B (40 Amps)

    $29.85 – $546.24     Select options
    $29.85 – $546.24
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 6-2-NM

    6/2 NM-B (55 Amps)

    $37.11 – $761.47     Select options
    $37.11 – $761.47
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 3-wire-NM

    8/3 NM-B, Southwire
    (40 Amps)

    $38.86 – $805.15     Select options
    $38.86 – $805.15
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 3-wire-NM

    6/3 NM-B, Southwire
    (55 Amps)

    $60.80 – $1,353.48     Select options
    $60.80 – $1,353.48
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125 150 175 200 225 250
    *
  • 3-wire-NM

    4/3 NM-B, Southwire
    (70 Amps)

    $80.88 – $583.97     Select options
    $80.88 – $583.97
    10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125
    *
  • Sale! 12-2-2

    Southwire 12/2/2 NM-B “Romex”

    $254.76     Add to cart