“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.”

Why Electricians Choose Pratt 250-250-3/0 Triplex Aluminum URD

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 90C, 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.

Technical Specifications: Pratt 250-250-3/0 URD

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: 90C (Wet or Dry).

• Cable Outer Diameter: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.

Common 250-250-3/0 URD Applications

• 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 buyers responsibility to verify that all materials meet the specific requirements of the project and comply with local electrical codes.

Ampacity: 90C conductor temperature, 20C 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.