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Physical Specifications
Technical Specifications
Usage & Installation:
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This 3/0 AWG (pronounced "three-aught"), 3-conductor assembly is a heavy-duty feeder cable designed for high-amperage power distribution. It is a staple in residential and commercial electrical systems, most frequently used for 200A residential service entrances and main sub-panel feeds in commercial buildings. The XHHW-2 rating makes it exceptionally versatile, allowing for installation in conduit in both wet and dry locations, including underground service laterals.
Priority-Plex® is a specialized manufacturing process where the conductors are pre-twisted (cabled) together at the factory.
At the 3/0 gauge, aluminum offers an optimal balance of high ampacity and cost-effectiveness. Using copper for a 200A run would be significantly heavier and more expensive.
According to NEC Table 310.16, the ampacity for 3/0 Aluminum depends on the temperature rating of the equipment terminations:
⚠️ PRO TIP: Most modern main breakers and distribution panels are rated for 75°C. Therefore, in most commercial applications, this cable is treated as a 155 Amp feeder. However, for residential service entrance applications (120/240V, single-phase), NEC 310.12 allows this gauge to be used for 200A services under the "83% rule," provided it carries the entire load of the dwelling.
This assembly follows the standard 120/240V or 120/208V color code for easy identification:
The colors are typically embedded in the XLPE insulation or clearly striped, ensuring permanent identification that won't rub off during a difficult pull through a long conduit run.
Yes we offer XHHW-2 Aluminum Wire in a single conductor from 14 AWG to 1000 MCM in multiple colors by the foot. Shop our single conductor XHHW-2 Collection here.
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