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This is a triplex underground service-drop cable: two 250 kcmil aluminum phase conductors and one 3/0 AWG aluminum neutral, rated 600V and 90°C. It is built for direct burial or duct runs, with XLPE insulation that resists moisture and heat. Ampacity is 345 amps direct-buried and 265 amps in duct, so it suits single-phase secondary runs from a transformer to a building. Buyers comparing it to quadplex or copper URD get a lighter, lower-ampacity aluminum cable that needs aluminum-rated lugs and antioxidant compound at terminations.
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Rated 4.9 out of 5 from 34 ratings. Buyers describe it as a solid, correctly specified URD cable for underground service work, with the triplex construction and ampacity matching what the job called for.
The Pratt 250-250-3/0 is a triplex aluminum URD cable rated for 600V. It is designed for single-phase secondary power distribution in underground electrical systems, including service drops from transformers to buildings. It can be direct buried or installed in duct.
The triplex configuration has two phase conductors and one neutral. All three conductors are aluminum. They are insulated with black cross-linked polyethylene (XLPE), which is watertight and resistant to corrosive substances, oil, heat and flame. The cable is rated for a maximum operating temperature of 90°C in wet and dry environments.
Typical uses include service meters in residential and rural areas, farms and irrigation, homes, small apartments and mobile parks, street lighting and municipal distribution, residential solar and battery storage connections, and temporary power for construction, events and backup.
