NEC Commercial Electrical Practice Test

What is the height requirement for unguarded live parts above working space over 600 volts?

1. 7 feet

2. 8 feet

3. 9 feet

4. 10 feet

The correct answer is: 9 feet

The requirement for the height of unguarded live parts above working space over 600 volts is specified to ensure safety in electrical installations. According to the National Electrical Code (NEC), live parts operating at over 600 volts must be installed at a minimum height of 9 feet above the working space. This regulation is intended to reduce the risk of accidental contact with high-voltage conductors, particularly in areas where personnel may be working. By maintaining this height standard, the NEC aims to protect workers from electrical shock hazards that can occur if they were to inadvertently come into contact with unguarded live parts. This safety measure is critical in both commercial and industrial settings, where high-voltage installations are common. Implementing such requirements helps to promote safe working environments and prevent accidents related to unguarded electrical equipment.