NEC Commercial Electrical Practice Test

What is the required width for entrances to large electrical equipment spaces?

1. 18 inches

2. 24 inches

3. 30 inches

4. 36 inches

The correct answer is: 24 inches

The required width for entrances to large electrical equipment spaces is typically set to ensure safe and efficient access for personnel and equipment. A width of 24 inches is adequate to accommodate both the passage of individuals and the transportation of tools or equipment that may be necessary for maintenance or emergency access. This size is aligned with safety standards and regulations outlined in the National Electrical Code, which emphasizes the importance of having sufficient space for both operational activities and safe egress in case of an emergency. Ensuring that entrances are at least 24 inches wide helps facilitate access without compromising safety or efficiency during operations involving large electrical equipment. Wider entrances may also be beneficial in certain contexts, but the minimum requirement establishes a baseline for operational effectiveness and safety protocols.