SPEC 22050

ROMEX® SIMpull® NMD90 Copper

300 Volts / -25ºC Min, 90ºC Max. Copper Conductors



  1. Conductor:Solid per ASTM B3 or Combination unilay-stranded copper conductors per ASTM B787.
  2. Insulation:All phases are insulated with Polyvinyl Chloride with Nylon Sheath
  3. Jacket:Polyvinyl Chloride PVC jacket utilizing SIMpull® Technology.

Applications and Features:

Southwire's Romex® SIMpull ® NMD90 cables may be used for both exposed work in dry locations or concealed work in dry or damp locations.
The maximum allowable conductor temperature is 90°C. The minimum recommended installation temperature is -25°C for two-conductor cables and -10°C for three-conductor cables (with suitable handling procedures). Material should be properly stored above 0°C for 24 hours prior to installation. The maximum voltage rating for all intended applications is 300 volts. Consult the Canadian Electrical Code1 for further information related to applications.


  • ASTM B3 Soft or Annealed Copper Wire
  • ASTM B8 Concentric-Lay-Stranded Copper Conductors
  • ASTM B787 19 Wire Combination Unilay-Stranded Copper Conductors
  • CSA C22.2 No. 48 non-metallic sheathed cable
  • ICEA S-95-658 (NEMA WC70) Power Cables Rated 2000 Volts or Less for the Distribution of Electrical Energy
  • IEEE 1202/FT4 Flame Test (70,000 BTU/hr) 350kcmil and Larger
  • Sample Print Legend:

    SOUTHWIRE MASTER-DESIGN CSA LL90458 12 AWG 2 CDRS BLACK/WHITE NMD90 NYLON ROMEX(R) BRAND SIMpull (TM) (-25C) 300 VOLTS FT1 COVERED & MADE UNDER U.S. PAT. NOS 7557301 & 7411129. [Jacket Colour is yellow]
    Table 1 – Weights and Measurements
    Stock NumberCond. SizeConductor NumberDiameter Over ConductorConductor StrandingInsulation ThicknessGround SizeJacket ThicknessApprox. ODOverall Weight
    AWG/KcmilinchmilsNo. x AWGmilinchlbs/1000ft
    4717481420.064Solid351 x 14300.196 x 0.39669
    4717971430.064Solid351 x 14300.38890
    4717551220.08Solid351 x 14300.213 x 0.43088
    4718051230.08Solid351 x 14300.428118
    4717631020.101Solid351 x 12300.234 x 0.488124
    4718131030.101Solid351 x 12300.479168
    551038820.1417401 x 10450.316 x 0.694210
    471821830.1417401 x 10450.635283
    557881620.1777501 x 8450.374 x 0.800339
    471839630.1777601 x 8450.775433
    557727420.2257501 x 8600.839463
    557882320.2527501 x 6800.937610
    676254330.2527501 x 6801.029822
    557880230.2827501 x 6800.991862
    All dimensions are nominal and subject to normal manufacturing tolerances
    ◊ Cable marked with this symbol is a standard stock item
    Table 2 – Electrical and Engineering Data
    Cond. SizeConductor NumberMin. Bend RadiusDC Resistance at 25°CAC Resistance at 75°CInductive Reactance @ 60HzAllowable Ampacity Raceway 60°CAllowable Ampacity Raceway 75°CAllowable Ampacity Raceway 90°C
    † Ampacities based upon 2023 NEC Table 310.16 and do not take into account the overcurrent protection limitations in NEC 240.4(D) of 15 Amps for 14 AWG CU, 20 Amps for 12 AWG CU, and 30 Amps for 10 AWG CU (independent of the conductor temperature rating and stranding if size is present in table). Also, see NEC sections 310.15 and 110.14(C) for additional requirements.
    † Ampacities have been adjusted for more than Three Current-Carrying Conductors.
    * Inductive impedance is based on non-ferrous conduit with one diameter spacing.

    Revision: 1.000.000

    Updated On: Aug. 18, 2023, 2:39 p.m. UTC