Overhead service conductors require a vertical clearance of at least how many feet over commercial areas not subject to truck traffic and with voltage not exceeding 300 volts?

For overhead service conductors located over commercial areas that are not subject to truck traffic and where the voltage does not exceed 300 volts, the National Electrical Code (NEC) specifies a minimum vertical clearance requirement. This requirement ensures safety by protecting both the electrical conductors and the general public from accidental contact.

In this particular scenario, the NEC mandates a minimum vertical clearance of 12 feet. This height is established to provide an adequate safety margin, allowing for clearance from structures and potential obstacles that could interfere with the power lines, ensuring they are above the reach of people and typical equipment used in commercial settings.

The distinction of not being subject to truck traffic is important, as areas with truck traffic may have different clearance requirements due to the larger height of vehicles that might be present.

Understanding these safety stipulations is crucial for anyone working with or around electrical service installations, as adhering to these guidelines helps to mitigate risks associated with electrical hazards.