500-500-300 Triplex Aluminum Direct Burial Cable, Holyoke URD

"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 Holyoke 500-500-300 Triplex Aluminum URD

The 500-500-300 Triplex Aluminum URD 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.

Technical Specifications: Holyoke 500-500-300 URD Cable

ENGINEERING OVERVIEW: 500-500-300 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: 2.12 inches (53.848 mm)

• Ampacity (Direct Burial): 495 Amps.

• Ampacity (In Duct): 395 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 500-500-300 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 400A capacity to support modern, high-load electrical systems and multi-family units.

• Sub-Panel Feeders: Reliable power transmission for large secondary distribution hubs, such as industrial workshops, heavy agricultural facilities, or detached commercial garages.

• Site Development: Robust power delivery for large-scale business infrastructure and exterior utility equipment where voltage drop is a critical concern.

• Direct Burial or Conduit: Versatile enough for direct-trench installation or pull-through duct/conduit runs.

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.

General Shipping Information

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 Shipping

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).

Returns

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.