NEC Commercial Electrical Practice Test

What is the minimum headroom clearance required above a 200 amp panel board in an existing dwelling?

1. 5 1/2 ft

2. 6 ft

3. 6 1/2 ft

4. 7 ft

The correct answer is: 6 1/2 ft

The minimum headroom clearance required above a 200 amp panel board in an existing dwelling is 6 1/2 feet. This requirement ensures safe access to the panel for maintenance and operation while allowing sufficient space for personnel to work around it without the risk of head injury. The clearance is set to promote safety in work environments, particularly in residential settings where space might be more constrained. Proper vertical clearance is also essential to adhere to local codes and the National Electrical Code (NEC), which emphasizes safety and accessibility for electrical installations. This dimension helps technicians and homeowners maintain the panel and access the breakers without obstruction, thus facilitating efficient operation and emergency responses when needed.