ALUMINUM URD DIRECT BURIAL CABLE

Aluminum URD Direct Burial Cable is an insulated power cable system specifically designed for underground electrical distribution networks. URD stands for Underground Residential Distribution cable. It is primarily used to carry electricity from distribution transformers directly to the service entrance or meter of homes and buildings, and is engineered for direct burial without the need for conduit.

Aluminum URD Direct Burial Cable is essential for various outdoor and underground electrical installations. Common applications include:

• Residential Secondary Feeds: Connecting service transformers to home meters.
• Detached Structures: Providing power to garages, shops, sheds, or barns.
• Mobile Home Feeders: Supplying power from a pedestal to a mobile home unit.
• Outdoor Equipment: Feeder runs for well pumps, septic systems, farm equipment, or lighting systems.

Using aluminum for URD direct burial cable offers significant benefits, primarily due to its cost-effectiveness and ease of installation. Aluminum is substantially less expensive and much lighter than copper, which reduces material costs and labor time for pulling large gauge cables through trenches. Modern aluminum conductors, often made of 1350-H19 alloy, provide reliable performance for 600V applications.

Yes, Aluminum URD Direct Burial Cable is specifically designed and rated for direct burial applications without the need for additional conduit. Its construction, including robust insulation like XLPE, protects it from moisture, soil pressure, and environmental stresses in both wet and dry underground conditions.

Aluminum URD Direct Burial Cable typically has a voltage rating of 600 volts. This makes it suitable for secondary voltage distribution networks, carrying power from transformers to end-users in residential and light commercial settings.

Selecting the correct cable size (gauge) is crucial for safety and performance, as it impacts current carrying capacity (ampacity) and voltage drop. Factors to consider include:

• Load Current: The total electrical load the cable needs to support.
• Circuit Length: Longer runs may require a larger gauge to minimize voltage drop.
• Voltage Level: URD cables are rated for 600V.
• Temperature Conditions: Underground installations can have heat dissipation limitations. Consulting an ampacity chart and performing voltage drop calculations based on your specific project requirements is recommended.

Aluminum URD Direct Burial Cable typically features a robust construction designed for underground environments. Key components include:

• Conductor: Concentric stranded or compacted 1350-H19 aluminum conductor.
• Insulation: Cross-linked polyethylene (XLPE) is the most common insulation, providing excellent electrical insulation and thermal resistance, suitable for wet and dry locations.
• Neutral Conductor: Bare aluminum wires, often concentrically applied, serve as the grounding and return path.
• Assembly: Often configured as triplex (three insulated phase conductors) or quadruplex (three insulated phase conductors and one neutral conductor).

URD cable and USE-2 cable are both rated for direct burial, but they serve slightly different primary purposes. URD (Underground Residential Distribution) cable is typically used for secondary power distribution networks from transformers to buildings. USE-2 (Underground Service Entrance) cable is often used for service entrance connections, bringing power from the utility's transformer to individual houses. Many URD cables carry a dual USE-2 rating, indicating their suitability for both applications.