NEC Commercial Electrical Practice Test

What is the minimum width required for an entrance to switchboards and control panels rated at 1200 amps or more?

1. 18 inches

2. 20 inches

3. 24 inches

4. 30 inches

The correct answer is: 24 inches

The minimum width required for an entrance to switchboards and control panels rated at 1200 amps or more is 24 inches. This requirement ensures that there is adequate space for maintenance personnel to access the equipment safely, allowing for efficient operation and service. A width of 24 inches provides enough room for technicians to maneuver while carrying tools or components, minimizing the risk of accidents and improving efficiency when performing maintenance tasks. Additionally, this standard aims to accommodate not just the physical size of the individuals who will be working in that space but also any equipment or tools they may need to bring with them during servicing. Maintaining a safe working environment around large electrical installations is critical for preventing injuries and ensuring compliance with safety regulations outlined within the NEC standards.