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 11 results

14/2 NM-B (15 Amps)
$14.65 – $146.91 Select options

$14.65 – $146.91

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14/3 NM-B, Southwire
(15 Amps)
$17.23 – $199.65 Select options

$17.23 – $199.65

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
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12/2 NM-B (20 Amps)
$18.74 – $234.09 Select options

$18.74 – $234.09

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10/2 NM-B (30 Amps)
$20.41 – $271.78 Select options

$20.41 – $271.78

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
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12/3 NM-B, Southwire
(20 Amps)
$20.55 – $274.79 Select options

$20.55 – $274.79

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
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10/3 NM-B, Southwire
(30 Amps)
$30.91 – $513.76 Select options

$30.91 – $513.76

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
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8/2 NM-B (40 Amps)
$31.76 – $589.66 Select options

$31.76 – $589.66

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
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6/2 NM-B (55 Amps)
$36.86 – $760.82 Select options

$36.86 – $760.82

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
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8/3 NM-B, Southwire
(40 Amps)
$39.99 – $787.37 Select options

$39.99 – $787.37

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
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6/3 NM-B, Southwire
(55 Amps)
$62.46 – $1,232.35 Select options

$62.46 – $1,232.35

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
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4/3 NM-B, Southwire
(70 Amps)
$109.43 – $720.44 Select options

$109.43 – $720.44

10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 125
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