3 AWG XHHW-2 Stranded Copper Building Wire
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3 AWG XHHW-2 Stranded Copper Building Wire

750 MCM XHHW-2 COPPER BUILDING WIRE
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3 AWG XHHW-2 Stranded Copper Building Wire
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3 AWG XHHW-2 Stranded Copper Building Wire
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3 AWG XHHW-2 Stranded Copper Building Wire
Roll over image to Zoom
3 AWG XHHW-2 Stranded Copper Building Wire
Roll over image to Zoom
3 AWG XHHW-2 Stranded Copper Building Wire
Roll over image to Zoom
3 AWG XHHW-2 Stranded Copper Building Wire
Roll over image to Zoom
3 AWG XHHW-2 Stranded Copper Building Wire
Roll over image to Zoom
3 AWG XHHW-2 Stranded Copper Building Wire
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3 AWG XHHW-2 Stranded Copper Building Wire
SKU: NNC2408X
xhhw-2-copper-building-wire-conductor

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Product Information
Specification

3 AWG XHHW-2 Stranded Copper Building Wire

Description:

Copper SIMpull XHHW-2/RW90 conductors are primarily used in conduit, cable trays, or other recognized raceways for services, feeders, and branch circuit wiring, as specified in the National Electrical Code (NEC). These conductors are rated for wet and dry locations, with a maximum operating temperature of 90°C. The voltage rating is 600V or 1000V for all sizes. This cable is designed for easier installation without the need for pulling lubricant. RW90 is suitable for open wiring and use in raceways (except cable troughs and ventilated flexible cableways) in wet or dry locations, as per the Canadian Electrical Code. Conductor sizes 8 AWG and larger are rated for 600V or 1000V single conductor copper with XLPE insulation and SIMpull technology for easier pulling.

Also Known As:

3 XHHW-2 Copper Building Wire, 3 XHHW Cable, 3 XHHW Service Wire, 3 XHHW Copper Wire, 3 CU Building Wire, 3 Black Stranded CU SIMpull XHHW-2 Wire, Southwire 26727899, Southwire Wire, 3 AWG XHHW Building Wire, 3 Gauge Black Stranded Copper XHHW-2 Wire, 3 Stranded Copper XHHW-2 Wire, 3 AWG Copper XHHW Wire, 3 Gauge Insulated Copper XHHW-2 Wire, 3 AWG Electrical XHHW-2 Cable, 100 amp wire, 100 amp cable

Common Uses of 3 AWG Copper XHHW-2 Wire

  • 100A branch circuits in commercial and industrial buildings (75°C rating)
  • 100A feeders and subpanels at full rating, including commercial and other non-dwelling installations
  • 110A home services under NEC 310.12
  • 100A circuits for 80A Level 2 EV chargers
  • 100A generator outputs and transfer switches
  • Main power feeders in commercial, industrial, and residential service panels
  • Large motor leads requiring 600V-rated copper conductors
  • HVAC system wiring for heavy-duty air conditioning units
  • Backup generator connections for emergency power distribution
  • Cable tray installations where NEC permits XHHW-2 conductors

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: Silicone-free, abrasion-resistant, high-heat, moisture-resistant

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:

  • ASTM B3 – Soft or Annealed Copper Wire
  • ASTM B8 – Concentric-Lay-Stranded Copper Conductors
  • ASTM B787 – 19 Wire Combination Unilay-Stranded Copper Conductors
  • UL 44 – Thermoset-Insulated Wires and Cables
  • UL 1685 – Vertical-Tray Fire Propagation and Smoke Release Test (1/0 and Larger)
  • CSA C22.2 No. 38 – Thermoset-insulated wires and cables
  • 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)
  • Federal Specification A-A-59544
  • NMX-J-451-ANCE – Thermoset insulated wires and cables
  • NOM-063-SCFI – Electrical Conductors Safety Requirements

Specifications:

  • Size: 3 AWG
    Number of Strands: 7
    Diameter Over Conductor (Inches): 0.252
    Insulation Thickness (mils): 45
    Approx. OD (Inches): 0.348
    Min Bending Radius: 1.4 inches
    Max Pull Tension: 420 lbs
    Copper Weight (lbs/mft): 162 lbs
    Net Weight (lbs/mft): 184 lbs
    Allowable Ampacity At 60°C: 85 Amps
    Allowable Ampacity At 75°C: 100 Amps
    Allowable Ampacity At 90°C: 115 Amps
    Southwire Part (SIMpull): 26727899

Manufacturer Equivalents

Advanced Digital : 

Black : 208
White : 208W
Red : 208RD

Green : 208GN

Aetna Digital : 

Black : 117-4400C
Green : 117-4405

Draka : 

Black : 6200110bk
White : 6200110wh
Red : 6200110rd

Green : 6200546gn

General Cable : 

Black : 798751

Kalas : Black : t.b.d.
White : t.b.d.
Red : t.b.d.

Green : t.b.d.

Omni Cable :

Black : M708ST-01
White : M708ST-02
Red : M708ST-03
Green : M708ST-04

Southwire :

Black : 26727899


*Data provided on this page is subject to change based on different manufacturers' variances
** Images are for display purposes only refer to Product Technical Details for accurate information on the product.
In the case the material only comes in a predetermined color or doesn’t come with any color
Download PDF Spec Sheet

FAQ's

What is 3 AWG copper XHHW-2 used for?

XHHW-2 is single-conductor building wire with cross-linked polyethylene (XLPE) insulation, which is where the "X" in its name comes from. "HHW" stands for high heat and water resistance, and "-2" means it's rated 90°C in wet locations as well as dry. 3 AWG copper XHHW-2 is installed in conduit or other NEC-recognized raceways at up to 600V and is rated 100A at 75°C. It's used for 100A feeders and subpanels at full rating, 110A home services, 80A EV chargers, and generator transfer switches.

What are the main differences between XHHW and XHHW-2 wires?

Both use cross-linked polyethylene (XLPE) insulation and are rated 600V. The difference is the wet rating. XHHW is rated 90°C in dry locations but only 75°C in wet locations. XHHW-2 is rated 90°C in both, and it passes stricter UL 44 moisture testing. XHHW-2 can be used anywhere XHHW is allowed.

What is the difference between THHN and XHHW-2 wire?

Both THHN/THWN-2 and XHHW-2 are 600V building wires rated 90°C in wet and dry locations, so the real difference is the insulation. THHN/THWN-2 has thin PVC insulation with a nylon jacket. XHHW-2 has a single, thicker layer of cross-linked polyethylene (XLPE), a thermoset material that doesn't melt. XHHW-2 holds up better to abrasion, moisture, and cold. THHN/THWN-2 has a smaller diameter, so more conductors fit in the same conduit, and it usually costs less.

Is 3 AWG copper XHHW-2 rated for a 100 amp service?

Yes, in any application. 3 AWG copper is rated 100A at 75°C, which covers a full 100A load in commercial and other non-dwelling installations. For a 100A home service, 4 AWG copper is enough under NEC 310.12.

Can XHHW-2 wire be buried underground?

Not directly. XHHW-2 is not rated for direct burial, so it can't go in a trench without conduit. It can be installed underground inside conduit, because underground raceways are wet locations and XHHW-2 is rated 90°C wet. For burial without conduit, use a direct burial cable such as USE-2 or URD.

Does XHHW-2 wire have to be run in conduit?

Yes, in standard building installations. XHHW-2 is a single-conductor building wire meant for conduit or other recognized raceways. It can't be run exposed outdoors or fished through walls like NM cable, so inside a wall it has to be in conduit, such as EMT or flexible metal conduit. The NEC allows a few exceptions, such as cable tray for 1/0 AWG and larger conductors with a CT marking, or open wiring on insulators, but these are uncommon.

Is XHHW-2 wire sunlight resistant?

Yes. NNC's XHHW-2 is marked sunlight resistant, so it holds up in conduit runs exposed to the sun and where the wire leaves the conduit, such as at a weatherhead. Sunlight resistance doesn't replace the conduit requirement.

Can XHHW-2 wire be used in cold weather?

Yes. XLPE insulation stays flexible in the cold much better than PVC-insulated THHN, which makes XHHW-2 easier to pull in winter. It's commonly rated for installation down to -40°C (-40°F). Check the spec sheet for the exact minimum.

Reviews

Customer Reviews

Based on 2 reviews
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W
William Arthur

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B
Bruce Rearick
House wiring

Great customer service

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