NEC Commercial Electrical Practice Test

What is the minimum width of working space required in front of a 12 inch wide panel board operating at less than 600 volts?

1. 24 inches

2. 30 inches

3. 36 inches

4. 42 inches

The correct answer is: 30 inches

The minimum width of working space required in front of a panel board operating at less than 600 volts is indeed 30 inches. This requirement serves crucial safety and accessibility purposes. According to the National Electrical Code (NEC), adequate working space is vital to ensure that electricians can perform maintenance, troubleshooting, and any necessary adjustments without risking injury. A width of 30 inches allows enough room for a technician to work comfortably in front of the panelboard while maintaining a safe distance from live components and potential hazards. This 30-inch requirement aligns with NEC Article 110.26, which specifies the dimensions necessary for working space in front of electrical equipment. This standard is in place not just for convenience, but also to foster a safe working environment, reducing the likelihood of accidents due to overcrowding or insufficient room to maneuver tools and equipment. In summary, the 30-inch space is necessary for both safety and functionality, ensuring that electrical professionals can work effectively without undue risk.