Final answer:
The ampacity of a No. 3-AWG XHHW wire in a wet location at 30 degrees Celsius, with not more than three conductors in the conduit, is typically 100 amperes.
Step-by-step explanation:
For No. 3-AWG XHHW copper wire in a wet location at 30 degrees Celsius, and with not more than three conductors in the conduit, the ampacity is typically 100 amperes. This information corresponds to the American National Standards Institute (ANSI)/National Electrical Code (NEC), which provides tables for conductor ampacities. XHHW stands for Cross-Linked High Heat Water-Resistant Insulated Wire, and the ampacity of a wire is the maximum current it can carry without exceeding its temperature rating.