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Switchboard Wire & Cable


  • Philatron SIS Wires are UL Listed and NEC Compliant.
  • High Quality Crosslinked Polyethylene (XLPE) Insulation.
  • Available in Solid & Extra Flexible Bare Copper Stranding.
  • Abrasion, Oil, Flame, Heat, Ozone, Water, and Sun Resistant.
  • 600 Volts – XLPE: 90°C / PVC: 90°C
  • Complies with National Electrical Code (NEC) as follows:
    Sizes 18 AWG to 16 AWG 90°C – PVC – UL Type MTW
    Sizes 14 AWG to 4/0 AWG 90°C – XLPE – UL Type SIS
    Sizes 250 MCM to 1,000 MCM 90°C XLPE – UL Type XHHW2
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To specify color add # to end of part number: Black-1, White-2, Red-3, Green-4, Orange-5, Blue-6, and Yellow-7.
Example: To order 14 solid Blue, the part number would be SIS14-6.
*Amps are based on the NEC Table 310.16 for 90°C (194°F) rated conductors at ambient temperature or 30°(86°F).


Part No. Size AWG Strands Wall Inch O.D. Inch Insulation Amps* Lbs Mft UL NEC Type
MTW18 - # 18 Solid 0.03 0.105 PVC 14 10 MTW
MTW18K - # 18 16x30ga 0.03 0.111 PVC 14 10 MTW
MTW16 - # 16 Solid 0.03 0.115 PVC 18 14 MTW
MTW16K - # 16 26x30ga 0.03 0.121 PVC 18 14 MTW
SIS14 - # 14 Solid 0.03 0.13 XLPE 25 17 SIS
SIS14K - # 14 41x30ga 0.03 0.144 XLPE 25 20 SIS
SIS12 - # 12 Solid 0.03 0.15 XLPE 30 25 SIS
SIS12K - # 12 65x30ga 0.03 0.167 XLPE 30 31 SIS
SIS10 - # 10 Solid 0.03 0.174 XLPE 40 38 SIS
SIS10K - # 10 104x30ga 0.03 0.184 XLPE 40 42 SIS
SIS8K - # 8 168 (7x24x30ga) 0.045 0.268 XLPE 55 76 SIS
SIS6K - # 6 259 (7x37x30ga) 0.045 0.3 XLPE 75 103 SIS
SIS4K - # 4 413 (7x59x30ga) 0.045 0.356 XLPE 95 152 SIS
SIS2H - # 2 133 (7x19x23ga) 0.045 0.42 XLPE 130 208 SIS
SIS1H - # 1 259 (7x37x25ga) 0.055 0.476 XLPE 150 266 SIS
SIS1/0H - # 1/0 259  (7x37x24ga) 0.055 0.52 XLPE 170 334 SIS
SIS2/0H - # 2/0 259 (7x37x23ga) 0.055 0.571 XLPE 195 422 SIS
SIS3/0H - # 3/0 259 (7x37x22ga) 0.055 0.628 XLPE 225 533 SIS
SIS4/0H - # 4/0 259 (7x37x21ga) 0.055 0.714 XLPE 260 670 SIS
XHHW250H - # 250 427 (7x61x.0242) 0.065 0.761 XLPE 290 795 XHHW2
XHHW350H - # 350 427 (7x61x.0286) 0.065 0.874 XLPE 350 1110 XHHW2
XHHW500H - # 500 427 (7x61x.0342) 0.065 1.034 XLPE 430 1590 XHHW2
XHHW750H - # 750 703 (19x37x.0316) 0.08 1.286 XLPE 535 2410 XHHW2
XHHW1000H-# 1000 703 (19x37x.0377) 0.08 1.458 XLPE 615 3205 XHHW2