From $0.20/ft
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Solid THHN/THWN-2 WireFrom $0.20/ft -
Solid THHN/THWN-2 WireFrom $0.20/ft - Solid THHN/THWN-2 WireFrom $0.20/ft
- Solid THHN/THWN-2 WireFrom $0.20/ft
Parent SKU : XHW400AL
SKU : XHW400AL-250-BK
"Engineered for budget-friendly power distribution and smooth conduit pulls, 400 MCM Aluminum XHHW-2 / RW90 Building Wire features compact-stranded AA-8000 aluminum alloy wrapped in a slick, low-friction XLPE jacket. Dual-rated for 600V/1000V systems and approved for wet or dry locations up to 90°C, it delivers superior cost and weight savings over copper for main feeders, commercial distribution centers, heavy industrial panels, and raceway applications."
Slick, Low-Friction XLPE Insulation: Features an advanced "slippery" outer compound that glides through conduit bends effortlessly without pulling lubricant or insulation damage.
AA-8000 Series Compact Aluminum: Built with Class B compact-stranded AA-8000 series aluminum alloy, reducing wire diameter to maximize conduit fill capacity.
Dual Voltage Rated (600V / 1000V): Rated for standard 600V systems as well as higher-voltage 1000V commercial and solar installations.
Cost-Effective Efficiency: Provides reliable conductivity with significant weight savings and lower material costs compared to equivalent copper conductors.
Phase Color Selection: Offered in Black, Red, White, Green, Blue, Orange, Brown, Yellow, Gray, and Purple for instant phase identification (check the dropdown above for real-time stock).
Cut-to-Length or Bulk Spools: Order custom lengths cut by the foot to minimize job-site scrap, or purchase bulk spools for high-volume commercial runs.
Conductor Size: 400 MCM (kcmil)
Conductor Material: AA-8000 Series Compact Stranded Aluminum Alloy (Class B)
Conductor Diameter: 0.659 inches (16.74 mm)
Insulation Material: Cross-Linked Polyethylene (XLPE / XLP)
Insulation Thickness: 0.065 inches (1.65 mm)
Overall Diameter: 0.792 inches (20.12 mm)
Approximate Net Weight: 453 lbs per 1,000 ft
Ampacity (@ 75°C Terminal Rating): 270 Amps
Ampacity (@ 90°C Terminal Rating): 305 Amps
Voltage Rating: 600V / 1000V (XHHW-2) | 600V (RW90)
Temperature Rating: -40°C to 90°C (Wet or Dry)
Compliance Standards: UL 44 / CSA C22.2 No. 38, UL 1685, ANSI/NEMA WC-70 / ICEA S-95-658, ASTM B800 & B801, Federal Spec A-A-59544A, NFPA 70 (NEC), CSA C22.1
270A–300A Commercial Feeder Services: Supplying heavy power to 270 Amp and 300 Amp main distribution panels, commercial subpanels, and industrial service equipment.
Parallel Feeder Runs for 600A–1200A Systems: Parallel sets installed in multi-conduit raceways to cost-effectively feed high-capacity 600A, 800A, 1000A, or 1200A commercial main distribution gear.
Heavy Industrial Equipment & Solar Plants: Routing high-capacity feeder circuits through underground PVC or metallic conduit for large solar inverter combiners, industrial manufacturing equipment, and commercial chiller facilities.
DISCLAIMER: All values are nominal and subject to correction. Ampacities for not more than three conductors in raceway or cable or earth (directly buried), based on ambient temperature of 30°C per Table 310.16 of the National Electrical Code.
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| Wire Size (AWG/MCM) | 400 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 0.792 in. / 20.117 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| UL Listing Numbers | UL 44, UL 1685, CSA |
| Voltage Rating | 600V |
| Ampacity Rating | 305 |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | UL 44 / CSA C22.2 No. 38 Thermoset-Insulated Wires and Cables UL 1685 Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables ANSI / NEMA WC-70 / ICEA S-95-658 ASTM B800, B801 Federal Specification A-A-59544A NFPA 70 National Electrical Code CSA C22.1 Canadian Electrical Code Sunlight resistant. |
| Miscellaneous Information | All values are nominal and subject to correction. **Ampacities for not more than three conductors in raceway or cable or earth (directly buried), based on ambient temperature of 30°C per Table 310.16 of the 2020 National Electrical Code. |
| RoHS Compliance | Yes |
| Primary Applications | Service Entrance Conductors, Feeders, Branch Circuit Wiring (larger sizes), Conduit and Raceways, Wet or Dry Locations, Cable Tray Installations, General Purpose Wiring |
| Common Uses |
|
| Weight per Foot | 0.453 lb |
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Parent SKU : XHW400AL
SKU : XHW400AL-250-BK
Parent SKU : XHW400AL
SKU : XHW400AL-250-BK
"Engineered for budget-friendly power distribution and smooth conduit pulls, 400 MCM Aluminum XHHW-2 / RW90 Building Wire features compact-stranded AA-8000 aluminum alloy wrapped in a slick, low-friction XLPE jacket. Dual-rated for 600V/1000V systems and approved for wet or dry locations up to 90°C, it delivers superior cost and weight savings over copper for main feeders, commercial distribution centers, heavy industrial panels, and raceway applications."
Slick, Low-Friction XLPE Insulation: Features an advanced "slippery" outer compound that glides through conduit bends effortlessly without pulling lubricant or insulation damage.
AA-8000 Series Compact Aluminum: Built with Class B compact-stranded AA-8000 series aluminum alloy, reducing wire diameter to maximize conduit fill capacity.
Dual Voltage Rated (600V / 1000V): Rated for standard 600V systems as well as higher-voltage 1000V commercial and solar installations.
Cost-Effective Efficiency: Provides reliable conductivity with significant weight savings and lower material costs compared to equivalent copper conductors.
Phase Color Selection: Offered in Black, Red, White, Green, Blue, Orange, Brown, Yellow, Gray, and Purple for instant phase identification (check the dropdown above for real-time stock).
Cut-to-Length or Bulk Spools: Order custom lengths cut by the foot to minimize job-site scrap, or purchase bulk spools for high-volume commercial runs.
Conductor Size: 400 MCM (kcmil)
Conductor Material: AA-8000 Series Compact Stranded Aluminum Alloy (Class B)
Conductor Diameter: 0.659 inches (16.74 mm)
Insulation Material: Cross-Linked Polyethylene (XLPE / XLP)
Insulation Thickness: 0.065 inches (1.65 mm)
Overall Diameter: 0.792 inches (20.12 mm)
Approximate Net Weight: 453 lbs per 1,000 ft
Ampacity (@ 75°C Terminal Rating): 270 Amps
Ampacity (@ 90°C Terminal Rating): 305 Amps
Voltage Rating: 600V / 1000V (XHHW-2) | 600V (RW90)
Temperature Rating: -40°C to 90°C (Wet or Dry)
Compliance Standards: UL 44 / CSA C22.2 No. 38, UL 1685, ANSI/NEMA WC-70 / ICEA S-95-658, ASTM B800 & B801, Federal Spec A-A-59544A, NFPA 70 (NEC), CSA C22.1
270A–300A Commercial Feeder Services: Supplying heavy power to 270 Amp and 300 Amp main distribution panels, commercial subpanels, and industrial service equipment.
Parallel Feeder Runs for 600A–1200A Systems: Parallel sets installed in multi-conduit raceways to cost-effectively feed high-capacity 600A, 800A, 1000A, or 1200A commercial main distribution gear.
Heavy Industrial Equipment & Solar Plants: Routing high-capacity feeder circuits through underground PVC or metallic conduit for large solar inverter combiners, industrial manufacturing equipment, and commercial chiller facilities.
DISCLAIMER: All values are nominal and subject to correction. Ampacities for not more than three conductors in raceway or cable or earth (directly buried), based on ambient temperature of 30°C per Table 310.16 of the National Electrical Code.
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| Wire Size (AWG/MCM) | 400 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Outer Diameter (OD) (in/mm) | 0.792 in. / 20.117 mm |
| Conductor Count | 1 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| UL Listing Numbers | UL 44, UL 1685, CSA |
| Voltage Rating | 600V |
| Ampacity Rating | 305 |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | UL 44 / CSA C22.2 No. 38 Thermoset-Insulated Wires and Cables UL 1685 Vertical-Tray Fire-Propagation and Smoke-Release Test for Electrical and Optical-Fiber Cables ANSI / NEMA WC-70 / ICEA S-95-658 ASTM B800, B801 Federal Specification A-A-59544A NFPA 70 National Electrical Code CSA C22.1 Canadian Electrical Code Sunlight resistant. |
| Miscellaneous Information | All values are nominal and subject to correction. **Ampacities for not more than three conductors in raceway or cable or earth (directly buried), based on ambient temperature of 30°C per Table 310.16 of the 2020 National Electrical Code. |
| RoHS Compliance | Yes |
| Primary Applications | Service Entrance Conductors, Feeders, Branch Circuit Wiring (larger sizes), Conduit and Raceways, Wet or Dry Locations, Cable Tray Installations, General Purpose Wiring |
| Common Uses |
|
| Weight per Foot | 0.453 lb |
In-stock orders placed before 3pm EST typically ship within 1-2 business days. Our business days are Monday through Friday; we do not process orders on Saturday, Sunday, or major US Holidays.
You will receive an e-mail with a tracking number within 1-2 business days from the time its shipped. You will also be able to view your order status and tracking numbers in your account order history.
Expedited shipments are delivered Monday-Friday except on US Holidays. The order must be placed before 12pm CST to ship same day ( Mon-Fri Only).
You have 30 days from the day you receive the item to contact us for a return. Returns are subject to a 30% Restocking Fee.
Please contact us at help@wireamerica.com to request a return authorization. Have your order number or name the order was placed with ready and we will email you an RMA (return) number and instructions for return. Currently, we do not offer exchanges. A new order must be placed if you need a different item. If you provide the new order number at the time of your return request, the restocking fee may be lowered.
Orders on any items with a material value of $50 or less are non-returnable.
Get notified when this product is back in stock
Physical Specifications
Technical Specifications
Usage & Installation:
Packaging & Dimensions:
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400 MCM Aluminum XHHW-2 is widely used for:
Per Table 310.16 of the National Electrical Code (NEC):
While both are popular single-conductor building wires used in conduit, key differences include:
Wire America supplies an extensive inventory of Aluminum XHHW-2 Building Wire from 8 AWG up to 1000 MCM, available in full phase colors and cut by the foot or on master reels. Orders are typically processed and shipped within 1 to 2 business days, delivering directly to your shop or job site within 2 to 4 business days once in transit.
We ship your order from the closest regional distribution hub to your job site to keep transit times and freight costs as low as possible. Expedited shipping options are also available at checkout.
Working against a tight job site or inspection deadline? Call our sales team directly at 833-268-8644 to request priority processing!
Yes! Rated at 270 Amps at 75°C terminal rating, 400 MCM Aluminum XHHW-2 can be installed on a 300A breaker under NEC 240.4(B) (the "next standard overcurrent device rating" rule) as long as the calculated load does not exceed 270 Amps.
Note: Always consult with a licensed electrician and check your local AHJ building codes to verify specific calculated loads, voltage drop for long runs, and installation requirements for your project.
No, single-conductor XHHW-2 wire cannot be directly buried in soil. While XHHW-2 features rugged cross-linked polyethylene (XLPE) insulation dual-rated for wet underground environments, NEC code requires single-conductor XHHW-2 building wire to be installed inside an approved raceway (such as Schedule 40 or 80 PVC, EMT, or Rigid Metallic Conduit) when placed underground.
Note: If your project requires direct burial without conduit, you will need a cable specifically rated for direct burial, such as USE-2 (Underground Service Entrance) or URD or Mobile Home Feeder (MHF) cable.
For a standard feeder installation using three 400 MCM conductors plus an equipment ground wire:
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