Final answer:
The minimum ground clearance for secondary services with voltages up to 750 volts in pedestrian areas is generally around 10 feet, but it's essential to consult local regulations or codes like the NEC for precise requirements.
Step-by-step explanation:
The minimum ground clearance for a secondary service with voltages ranging from 0 to 750 volts in areas restricted to pedestrian traffic is determined by local regulations and national codes like the National Electrical Code (NEC) in the United States. It's typically around 10 feet to ensure safety from electrical hazards. Factors that can affect this requirement include whether the wiring is overhead or underground, the type of area (urban, rural, commercial, or residential), and the expected traffic (pedestrian or vehicular).
However, without exact references to a specific code or location, it's not possible to provide a precise measurement. You need to refer to the local utility company or electric code for the area in question to determine the exact ground clearance required.