NEC Commercial Electrical Practice Test

What is the required minimum height for a fence around outdoor electrical installations?

1. 5 feet

2. 7 feet

3. 8 feet

4. 10 feet

The correct answer is: 7 feet

The required minimum height for a fence around outdoor electrical installations is established to ensure safety and security. In this case, a height of 7 feet is appropriate because it acts as a sufficient barrier against unauthorized access and minimizes the risk of accidental contact with electrical equipment. This height is also in line with industry standards that account for adult individuals attempting to climb over or access the area. By specifying a height of 7 feet, it provides an effective deterrent against casual trespassing while still being feasible for maintenance and inspection purposes. Other options, like 5 feet, may not provide adequate security, while heights of 8 or 10 feet could be excessive and impractical for typical installation settings, potentially increasing costs without offering proportionate benefits in safety or security.