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Code Quiz: Calculating Conductor Ampacity

A look at how location affects ampacity of a 3-phase feeder to a remote building.

Question: What is the maximum ampacity of a 3-phase feeder consisting of 3 - 4/0 and 1 – No. 4 GND in a 2-in. PVC conduit? The feeder is installed underground to a remote building. All conductors are XHHW Copper. The lugs at both ends are rated at 90°C.

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