Final answer:
The minimum height requirement for a transformer on a pole in an accessible area is typically at least 8 feet above the ground, according to the NEC. However, local building codes or utility regulations may dictate the exact requirement.
Step-by-step explanation:
The question pertains to the minimum height requirement for installing a transformer on a pole for a permanent outdoor floodlighting system, where the bottom of the transformer must be out of reach of unauthorized persons.
According to the National Electrical Code (NEC), transformers installed in public areas or accessible to the public, such as the described outdoor floodlighting transformer, should generally be mounted at least 8 feet above the ground. This height is considered safe to prevent any unauthorized access and to protect people from electrical hazards. The actual height requirement might be specified by local building codes or utility company regulations, so it is essential to consult those as well.