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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 : ERL-4URD
SKU : ERL-4URD-100
"The industry-standard for secondary three-phase residential, farm, and commercial power distribution. Engineered for reliable 600V delivery, this cable is rated for both direct burial and duct installations, featuring sunlight-resistant XLP insulation for robust, long-term underground performance."
The Earlham 4/0 Quadruplex is the definitive choice for underground three-phase power in high-capacity applications requiring a full-size neutral. Unlike "reduced neutral" cables, the Earlham features four identical 4/0 conductors, providing a full-capacity return path for systems with significant unbalanced loads, heavy electronic equipment, or non-linear industrial machinery. By utilizing high-conductivity 1350-H19 aluminum and heavy-duty, sunlight-resistant XLP insulation, it provides maximum reliability in the most demanding high-heat and high-moisture environments.
600V Reliability: Rated for continuous operation in wet or dry locations at temperatures up to 90°C, providing dependable power for high-capacity 3-phase equipment.
Full-Size Neutral Advantage: Featuring a matching 4/0 neutral, this cable is ideal for projects that must comply with strict utility company specifications or handle high neutral currents.
Sunlight-Resistant XLP: Advanced cross-linked polyethylene insulation prevents premature aging caused by UV exposure at termination points and service entrances.
Direct Burial Ready: Specifically built for the harsh conditions of underground utility distribution; can be installed directly in the earth or within conduit/duct systems.
ENGINEERING OVERVIEW: 4/0 Quadruplex URD (Full Neutral)
Application: Quadruplex Aluminum 600V URD cable is designed for use in secondary distribution circuits, where installed in duct or direct burial applications.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Concentric stranded or compressed 1350-H19 series aluminum.
Phase Insulation: Black sunlight-resistant XLP (Cross-Linked Polyethylene).
Neutral Insulation: Black XLP with 3 extruded yellow stripes for easy identification.
Temperature Rating: 90°C (Wet or Dry).
Phase Conductor Size: 4/0 AWG.
Neutral Conductor Size: 4/0 AWG (Full-Size Neutral).
Outside Diameter: 1.59 inches (40.386 mm)
Ampacity (Direct Burial): 290 Amps.
Ampacity (In Duct): 225 Amps.
Compliance Standards: UL 854; Type USE-2; RUS Accepted; ASTM B-230, B-231, B-609, B-901; ICEA S-105-692.
Commercial EV Charging Hubs: The top choice for underground runs to Level 2 and Level 3 charging pedestals. The full-sized neutral safely handles the harmonic distortion and unbalanced loads often generated by high-speed EV charging equipment.
Data Centers & Server Rooms: Ideal for secondary power distribution in tech facilities where a robust neutral is required to handle the switch-mode power supplies of servers and networking gear.
Modern Retail & Office Complexes: Used in buildings with high concentrations of LED lighting, computers, and variable-frequency drives (VFDs), which can cause significant return current on the neutral leg.
Industrial Machine Shops: Frequently used to power heavy 3-phase machinery that also utilizes 120V controls and ancillary equipment, ensuring the neutral conductor never becomes a bottleneck.
Multi-Family Residential Meter Stacks: Perfect for feeding apartment building meter banks where individual units may be pulling heavily unbalanced loads at different times of the day.
Event Centers & Mobile Power Distribution: Often used for outdoor amphitheaters, fairgrounds, and temporary stages where large-scale lighting and sound systems require a full-capacity neutral for system stability.
Solar Array AC Collection: A durable solution for underground AC runs from 3-phase inverters to a main tie-in panel, particularly in commercial-scale photovoltaic installations.
Large Agricultural Infrastructure: Frequently used for large-scale grain drying systems and high-horsepower irrigation pumps where a robust neutral path is essential.
Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.
Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations.
| Wire Size (AWG/MCM) | 4/0 |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 1.59 in. / 40.386 mm |
| Jacket Type | XLPE |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600 |
| Ampacity Rating | 290 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B-230 Aluminum 1350-H19 Wire for Electrical Purposes ASTM B-231 Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B-609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes ASTM B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire Construction ICEA S-105-692 600 Volt Single Layer Thermoset Insulated Utility Underground Distribution Cables Federal Specification A-A-59544A UL 854 Service-Entrance Cables Sunlight Resistant RUS Accepted |
| Miscellaneous Information | All values are nominal and subject to correction. *Not RUS accepted size **Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations. |
| Primary Applications | Underground Secondary Power Distribution |
| Common Uses |
|
| Weight per Foot | 1.101 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 : ERL-4URD
SKU : ERL-4URD-100
Parent SKU : ERL-4URD
SKU : ERL-4URD-100
"The industry-standard for secondary three-phase residential, farm, and commercial power distribution. Engineered for reliable 600V delivery, this cable is rated for both direct burial and duct installations, featuring sunlight-resistant XLP insulation for robust, long-term underground performance."
The Earlham 4/0 Quadruplex is the definitive choice for underground three-phase power in high-capacity applications requiring a full-size neutral. Unlike "reduced neutral" cables, the Earlham features four identical 4/0 conductors, providing a full-capacity return path for systems with significant unbalanced loads, heavy electronic equipment, or non-linear industrial machinery. By utilizing high-conductivity 1350-H19 aluminum and heavy-duty, sunlight-resistant XLP insulation, it provides maximum reliability in the most demanding high-heat and high-moisture environments.
600V Reliability: Rated for continuous operation in wet or dry locations at temperatures up to 90°C, providing dependable power for high-capacity 3-phase equipment.
Full-Size Neutral Advantage: Featuring a matching 4/0 neutral, this cable is ideal for projects that must comply with strict utility company specifications or handle high neutral currents.
Sunlight-Resistant XLP: Advanced cross-linked polyethylene insulation prevents premature aging caused by UV exposure at termination points and service entrances.
Direct Burial Ready: Specifically built for the harsh conditions of underground utility distribution; can be installed directly in the earth or within conduit/duct systems.
ENGINEERING OVERVIEW: 4/0 Quadruplex URD (Full Neutral)
Application: Quadruplex Aluminum 600V URD cable is designed for use in secondary distribution circuits, where installed in duct or direct burial applications.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Concentric stranded or compressed 1350-H19 series aluminum.
Phase Insulation: Black sunlight-resistant XLP (Cross-Linked Polyethylene).
Neutral Insulation: Black XLP with 3 extruded yellow stripes for easy identification.
Temperature Rating: 90°C (Wet or Dry).
Phase Conductor Size: 4/0 AWG.
Neutral Conductor Size: 4/0 AWG (Full-Size Neutral).
Outside Diameter: 1.59 inches (40.386 mm)
Ampacity (Direct Burial): 290 Amps.
Ampacity (In Duct): 225 Amps.
Compliance Standards: UL 854; Type USE-2; RUS Accepted; ASTM B-230, B-231, B-609, B-901; ICEA S-105-692.
Commercial EV Charging Hubs: The top choice for underground runs to Level 2 and Level 3 charging pedestals. The full-sized neutral safely handles the harmonic distortion and unbalanced loads often generated by high-speed EV charging equipment.
Data Centers & Server Rooms: Ideal for secondary power distribution in tech facilities where a robust neutral is required to handle the switch-mode power supplies of servers and networking gear.
Modern Retail & Office Complexes: Used in buildings with high concentrations of LED lighting, computers, and variable-frequency drives (VFDs), which can cause significant return current on the neutral leg.
Industrial Machine Shops: Frequently used to power heavy 3-phase machinery that also utilizes 120V controls and ancillary equipment, ensuring the neutral conductor never becomes a bottleneck.
Multi-Family Residential Meter Stacks: Perfect for feeding apartment building meter banks where individual units may be pulling heavily unbalanced loads at different times of the day.
Event Centers & Mobile Power Distribution: Often used for outdoor amphitheaters, fairgrounds, and temporary stages where large-scale lighting and sound systems require a full-capacity neutral for system stability.
Solar Array AC Collection: A durable solution for underground AC runs from 3-phase inverters to a main tie-in panel, particularly in commercial-scale photovoltaic installations.
Large Agricultural Infrastructure: Frequently used for large-scale grain drying systems and high-horsepower irrigation pumps where a robust neutral path is essential.
Technical Note: All values are nominal and subject to industry tolerances and manufacturer corrections. Specifications are subject to change without notice. It is the buyer’s responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.
Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations.
| Wire Size (AWG/MCM) | 4/0 |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 19 |
| Outer Diameter (OD) (in/mm) | 1.59 in. / 40.386 mm |
| Jacket Type | XLPE |
| Conductor Count | 4 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600 |
| Ampacity Rating | 290 |
| Direct Burial Rating | Yes |
| Submersible | No |
| Flexibility Rating | Low |
| Sunlight Resistance Rating | Yes |
| Temperature Rating | 90ºC |
| Standards | ASTM B-230 Aluminum 1350-H19 Wire for Electrical Purposes ASTM B-231 Concentric-Lay-Stranded Aluminum 1350 Conductors ASTM B-609 Aluminum 1350 Round Wire, Annealed and Intermediate Tempers, for Electrical Purposes ASTM B-901 Compressed Round Stranded Aluminum Conductors Using Single Input Wire Construction ICEA S-105-692 600 Volt Single Layer Thermoset Insulated Utility Underground Distribution Cables Federal Specification A-A-59544A UL 854 Service-Entrance Cables Sunlight Resistant RUS Accepted |
| Miscellaneous Information | All values are nominal and subject to correction. *Not RUS accepted size **Ampacity: 90°C conductor temperature, 20°C ambient temperature, RHO 90, 100% load factor. Single and Quadruplex based on 3/C. Neutral wire carries unbalanced load only. Reference NEC article 310.15 for NEC installations. |
| Primary Applications | Underground Secondary Power Distribution |
| Common Uses |
|
| Weight per Foot | 1.101 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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Note: These ratings are based on a 90°C conductor temperature. Most residential 200A services use 4/0 Aluminum to satisfy the 75°C terminal requirements of the breaker. Always consult with your local electrical inspector to ensure the cable meets your specific load and environmental requirements.
URD stands for Underground Residential Distribution. It is a category of electrical cable specifically engineered for direct burial in the earth. Unlike standard indoor wire, URD is built with rugged XLPE (Cross-Linked Polyethylene) insulation that is chemically designed to resist moisture, soil acids, and mechanical pressure without needing a protective outer jacket or conduit.
Yes, it is specifically designed for Direct Burial. Its XLPE insulation is rated for long-term exposure to soil moisture and chemicals. For safety, ensure it is buried at the depth required by your local code (usually 24 inches) and use a layer of sand or stone-free fill to protect the insulation from sharp debris.
Pro Tip: Even though it's direct burial, running it through a PVC sleeve where it leaves the ground protects it from weed-whackers and lawnmowers.
Modern Level 2 and Level 3 EV chargers can create unbalanced loads and harmonic distortion. Using Earlham 4/0 ensures that your neutral conductor is just as capable as your phase legs, preventing the neutral from overheating during long, continuous charging cycles. It is the best way to "future-proof" commercial EV infrastructure.
You can use standard large-gauge wire strippers and cutters. However, you must use AL9CU rated lugs and apply an antioxidant joint compound to the stripped ends. This prevents the aluminum from oxidizing, which is vital for maintaining a cool, safe connection over time.
Choose Earlham if your project involves heavy single-phase loads on a three-phase system or if your local utility company mandates that the neutral conductor matches the size of the phase conductors.
Aluminum URD is the industry standard for underground utility feeds because it is significantly more cost-effective and lighter than copper. At the 4/0 size, aluminum provides the necessary ampacity for large residential and commercial feeds at a fraction of the cost of copper.
Due to the four full-sized conductors, the assembly is quite large (approx. 1.68–1.70 inches OD).
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