Final answer:
Ampacity refers to the maximum current a conductor can carry without damage, and it depends on installation conditions and ambient temperature. To determine the ampacity of a #3/0 THWN conductor at 104°F, reference the NEC tables for the appropriate temperature correction factors.
Step-by-step explanation:
The question pertains to the ampacity of a conductor, specifically a #3/0 THWN conductor, when installed in an environment where the ambient temperature is 104°F. Ampacity is the maximum current an electrical conductor can handle before sustaining immediate or progressive deterioration, also referred to as the current carrying capacity of the conductor. The National Electrical Code (NEC) provides tables that determine the ampacity of conductors for various installation conditions.
However, given the provided information, we cannot determine the exact ampacity without consulting the NEC tables. Typically, the ampacity is affected by conductor insulation type, installation conditions, number of current-carrying conductors, and ambient temperature. For temperatures above 30°C (86°F), the ampacity must be derated according to NEC guidelines. To answer the question accurately, one would reference NEC table 310.15(B)(2)(a) for the ambient temperature correction factors applicable to the specific conductor insulation type in question.