Product Information

Specification

400 MCM XHHW-2 Copper Building Wire

Allowable Ampacity (Per NEC Table 310.16):

• 60°C: 280 Amps
• 75°C: 335 Amps
• 90°C (XHHW-2 Rating): 380 Amps

Description:

400 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, it operates in wet, dry, and corrosive environments, with a maximum temperature rating of 90°C.

Also Known As:

400 XHHW-2 Copper Building Wire, 400 XHHW Cable, 400 XHHW Service Wire, 400 XHHW Copper Wire, 400 MCM XHHW Wire, 400 MCM Copper XHHW-2 Cable, 400 MCM Electrical Wire, 400 MCM Stranded Copper XHHW-2.

Applications:

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

Construction:

Conductor:

• Material: Annealed bare copper (concentrically stranded)
• Properties: High conductivity, moisture resistance, and excellent durability

Insulation:

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

Standards & Compliance:

• UL Standard 83 – Thermoset-Insulated Wires and Cables
• ASTM B3 & B8 – Soft and Concentric-Lay-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

Specifications:

• Size: 400 MCM
  Number of Strands: 37
  Diameter Over Conductor (Inches): 0.815
  Insulation Thickness (mils): 65
  Weight per 1,000 ft: 1330 lbs
  Jacket: XLPE

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

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