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Parent SKU : PRT-3URD
SKU : PRT-3URD-100
"The industry-standard for high-amperage 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 Pratt 250-250-3/0 URD cable is the heavy-duty solution for high-capacity secondary underground power distribution. Engineered to meet the rigorous demands of demanding service upgrades and large-scale site developments, it provides a stable, high-performance solution for moving substantial power from the transformer to the service entrance. By utilizing high-conductivity 1350-H19 aluminum and a heavy-duty, sunlight-resistant XLP insulation, it offers superior resistance to environmental degradation, moisture ingress, and thermal stress.
600V Reliability: Rated for continuous operation in wet or dry locations at temperatures up to 90°C, ensuring stability under heavy load conditions.
Sunlight-Resistant XLP: Advanced cross-linked polyethylene insulation prevents premature aging caused by UV exposure, maintaining structural integrity at the service entrance.
Easy-Identify Neutral: For faster installation and safer maintenance, the neutral conductor features three extruded yellow stripes and clear sequential footage markings.
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: 250-250-3/0 Triplex URD
Application: Secondary underground distribution circuits; high-capacity transformer-to-service-entrance power feeds.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Concentric stranded 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).
Cable Outer Diameter:Â 1.62 inches (41.148 mm)
Ampacity (Direct Burial): 345 Amps.
Ampacity (In Duct): 265 Amps.
Compliance Standards: UL 854 (Service-Entrance Cable); Type USE-2; RUS Accepted; ASTM B-230, B-231, B-609, B-901; ICEA S-105-692; Federal Spec A-A-59544A.
Main Service Entrance: High-amperage power feed from the utility transformer to the main distribution panel for large residential or commercial buildings.
Service Upgrades: Essential for heavy-duty service upgrades requiring 300A+ capacity to support modern, high-load electrical systems.
Sub-Panel Feeders: Reliable power transmission for large secondary distribution hubs, such as workshops, agricultural facilities, or detached commercial garages.
Site Development: Robust power delivery for medium-to-large business infrastructure and exterior utility equipment.
Direct Burial or Conduit: Versatile enough for direct-trench installation or pull-through duct/conduit runs in large-scale infrastructure projects.
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) | 250 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 1.62 in. / 41.148 mm |
| Jacket Type | XLPE |
| Conductor Count | 3 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 345 |
| 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. *Actual number of wires may differ for compressed round stranded aluminum conductors using single input wire (SIW) **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 | 0.89 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 : PRT-3URD
SKU : PRT-3URD-100
Parent SKU : PRT-3URD
SKU : PRT-3URD-100
"The industry-standard for high-amperage 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 Pratt 250-250-3/0 URD cable is the heavy-duty solution for high-capacity secondary underground power distribution. Engineered to meet the rigorous demands of demanding service upgrades and large-scale site developments, it provides a stable, high-performance solution for moving substantial power from the transformer to the service entrance. By utilizing high-conductivity 1350-H19 aluminum and a heavy-duty, sunlight-resistant XLP insulation, it offers superior resistance to environmental degradation, moisture ingress, and thermal stress.
600V Reliability: Rated for continuous operation in wet or dry locations at temperatures up to 90°C, ensuring stability under heavy load conditions.
Sunlight-Resistant XLP: Advanced cross-linked polyethylene insulation prevents premature aging caused by UV exposure, maintaining structural integrity at the service entrance.
Easy-Identify Neutral: For faster installation and safer maintenance, the neutral conductor features three extruded yellow stripes and clear sequential footage markings.
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: 250-250-3/0 Triplex URD
Application: Secondary underground distribution circuits; high-capacity transformer-to-service-entrance power feeds.
Voltage Rating: 600 Volts.
UL Listing: UL 854 (Service-Entrance Cable).
Conductor Material: Concentric stranded 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).
Cable Outer Diameter:Â 1.62 inches (41.148 mm)
Ampacity (Direct Burial): 345 Amps.
Ampacity (In Duct): 265 Amps.
Compliance Standards: UL 854 (Service-Entrance Cable); Type USE-2; RUS Accepted; ASTM B-230, B-231, B-609, B-901; ICEA S-105-692; Federal Spec A-A-59544A.
Main Service Entrance: High-amperage power feed from the utility transformer to the main distribution panel for large residential or commercial buildings.
Service Upgrades: Essential for heavy-duty service upgrades requiring 300A+ capacity to support modern, high-load electrical systems.
Sub-Panel Feeders: Reliable power transmission for large secondary distribution hubs, such as workshops, agricultural facilities, or detached commercial garages.
Site Development: Robust power delivery for medium-to-large business infrastructure and exterior utility equipment.
Direct Burial or Conduit: Versatile enough for direct-trench installation or pull-through duct/conduit runs in large-scale infrastructure projects.
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) | 250 MCM |
| Conductor Material | Aluminum |
| Conductor Type | Stranded |
| Strand Count | 37 |
| Outer Diameter (OD) (in/mm) | 1.62 in. / 41.148 mm |
| Jacket Type | XLPE |
| Conductor Count | 3 |
| Shield | Unshielded |
| Insulation Type | (XLPE) Cross-Linked Polyethylene |
| Voltage Rating | 600V |
| Ampacity Rating | 345 |
| 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. *Actual number of wires may differ for compressed round stranded aluminum conductors using single input wire (SIW) **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 | 0.89 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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This specific "Pratt" code name refers to a Triplex cable with a reduced neutral. It consists of:
The ampacity depends on your installation method and the temperature rating of your terminals:
Pro Tip: Because the 250 KCMIL conductors are larger than 4/0, this cable is the go-to choice for 200-Amp or 300-Amp services where voltage drop over long distances is a concern.
Note: Always consult your local electrical inspector and NEC Table 310.15 to ensure the ampacity meets your specific service calculation.
Yes. Pratt 250 MCM Triplex URD is specifically engineered for Direct Burial. The conductors are insulated with Cross-linked Polyethylene (XLPE), which is highly resistant to moisture, and the corrosive elements found in soil. You can lay this directly in a trench, provided you follow local depth requirements (typically 24 inches for residential).
The Pratt 250-250-3/0 is rated for 600 Volts. This makes it ideal for secondary power distribution—taking power from the utility transformer and delivering it to the main service entrance or a large sub-panel in a detached workshop or barn.
No. Like most URD (Underground Residential Distribution) cables, Pratt is not fire-rated for indoor use. The National Electrical Code (NEC) generally limits URD cable to no more than a few feet inside a building before it must terminate or transition to a code-compliant indoor wire like SER or THHN in conduit.
The configuration choice depends on your electrical system's phase requirements. Triplex (two phase conductors and one neutral) is the industry standard for 120/240V residential service. Quadruplex (three phase conductors and one neutral) is specifically used for 3-phase applications. To see the full range of configurations available for your project, you can compare all of our options in our Full Aluminum URD Collection here.
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