Final answer:
Type UF cable must be buried at least 18 inches deep under a parking lot according to the National Electrical Code.
Step-by-step explanation:
The question asked pertains to the depth requirement for burying Type UF (Underground Feeder) electrical cable beneath a parking lot. According to the National Electrical Code (NEC), Type UF cable must be buried at least 18 inches deep. This code is in place to protect the cable from potential damage due to external forces or excavation activities. The NEC specifies different burial depths for different types of installations and protections, but for Type UF cable under a parking lot without additional protection, 18 inches is the minimum depth required.