NEC Commercial Electrical Practice Test

What is the minimum depth of working space at electrical equipment over 600 volts?

1. 2 feet

2. 3 feet

3. 4 feet

4. 5 feet

The correct answer is: 3 feet

The minimum depth of working space at electrical equipment over 600 volts is established to ensure the safety of personnel who may need to operate or service such equipment. The correct answer is three feet. This requirement is outlined in the National Electrical Code (NEC) to provide adequate space for safe access and to minimize the risk of electrical hazards. Having three feet of working space allows electricians and maintenance workers to work comfortably and safely around high-voltage equipment. This clearance is critical for ensuring that they can easily access switches, breakers, and other components without risking contact with energized parts. The NEC sets these standards not only to promote a safe working environment but also to aid in emergency situations where quick access to equipment is necessary. While other options reflect values that might seem reasonable, they do not meet the specific requirements outlined in the NEC for the depth of working space regarding equipment over 600 volts.