Final answer:
The ampacity of three #8 XHHW conductors in a wet location with an ambient temperature of 45°C cannot be specified without consulting the NEC code tables, which account for temperature correction factors.
Step-by-step explanation:
To determine the ampacity of a conductor, one must first recognize the type of conductor and the size, as well as the conditions it is operating under, such as the ambient temperature and whether it is in a wet or dry location. The question specifies that we have three #8 XHHW conductors installed in a wet location with an ambient temperature of 45°C. The National Electrical Code (NEC) provides tables to determine the ampacity of conductors under various conditions.
However, without the NEC code tables or more detailed information on the insulation type and conditions, one cannot provide a precise value for the conductor’s ampacity. It should be noted that the ambient temperature can affect the conductor’s ampacity; typically, an increase in ambient temperature requires a de-rating of the ampacity to ensure safe operation. Consulting the NEC code books, specifically the ampacity tables and temperature correction factors, would provide the necessary information to answer this question accurately.