Product Information

Specification

250 MCM XHHW-2 Copper Building Wire

Allowable Ampacity (Per NEC Table 310.16):

• 60°C: 215 Amps
• 75°C: 255 Amps
• 90°C (XHHW-2 Rating): 290 Amps

Description:

250 MCM XHHW-2 Copper Building Wire is a stranded conductor with cross-linked polyethylene (XLPE) insulation, designed for use in conduit, raceways, and feeders where high ampacity and durability are required. Rated for 600V or 1000V, it operates in wet, dry, and corrosive environments, with a maximum temperature rating of 90°C. The SIMpull technology allows for easier installation without the need for additional pulling lubricant.

Also Known As:

250 MCM Wire, 250 KCMIL Wire, 250 XHHW Cable 37 Strand, 250 KCMIL CU Cable, 250 MCM Copper Cable, 250 KCMIL CU Cable, 250 XHHW-2 Copper Building Wire, 250 XHHW Cable, 250 XHHW Service Wire, 250 XHHW-2 Copper Wire, 250 CU Building Wire, 250 Black Stranded CU SIMpull XHHW-2 Wire, Southwire 11304399, 250 MCM XHHW Building Wire, XHHW Stranded Building Wire.

Applications:

• Main service conductors for high-load electrical panels
• Primary and secondary feeders in commercial and industrial buildings
• Underground conduit installations where moisture resistance is required
• Backup generator wiring for hospitals, data centers, and critical facilities
• Cable tray wiring in industrial settings requiring high ampacity

Construction:

Conductor:

• Material: Class B compressed stranded bare copper per ASTM B3 and ASTM B8

Insulation:

• Material: Cross-linked polyethylene (XLPE) with SIMpull Technology
• Properties: Flame-retardant, resistant to chemicals, moisture, and abrasion

Features:

• SIS - 8 AWG and larger
• Sunlight resistant
• -40°C cold bend resistance
• FT1 flame test rating
• Gasoline and oil resistant II
• CT Rated - 1/0 AWG and larger
• FT4 flame test - 350 kcmil and larger
• RoHS/REACH compliant

Standards & Compliance:

• UL Standard 83 – Thermoset-Insulated Wires and Cables
• ASTM B3 & B8 – Soft and Concentric-Lay-Stranded Copper Conductors
• ASTM B787 – 19 Wire Combination Unilay-Stranded Copper Conductors
• Federal Specification A-A-59544
• RoHS/REACH Compliant
• NEC Article 310.16 – Ampacity Ratings
• ICEA S-95-658 (NEMA WC70) – Power Cables Rated 2000V or Less
• IEEE 1202/FT4 Flame Test – (70,000 BTU/hr) 350kcmil and Larger
• Buy American & Buy America Act (BAA) Compliant (49 U.S.C. § 5323(j) and 49 C.F.R. part 661)

Specifications:

• Size: 250 MCM
  Number of Strands: 37
  Diameter Over Conductor (Inches): 0.558
  Insulation Thickness (mils): 65
  Approx. OD (Inches): 0.700
  Copper Weight (lbs/mft): 771 lbs
  Net Weight (lbs/mft): 838 lbs
  Min Bending Radius: 2.8 inches
  Max Pull Tension: 2000 lbs
  Southwire Part (SIMpull®): 11304399

*Data provided on this page is subject to change based on different manufacturers' variances

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