Master Electrician Practice Exam

Where should cabinets containing overcurrent protective devices NOT be located?

1. Above electrical panels

2. In living areas

3. Over steps of a stairway

4. In basements

The correct answer is: Over steps of a stairway

The correct choice is that cabinets containing overcurrent protective devices should not be located over steps of a stairway. This restriction is primarily safety-based, as placing such cabinets in that location can create a hazardous situation. Overcurrent protective devices, such as circuit breakers or fuses, are usually accessed for maintenance, resets, or checks. If a cabinet is positioned above a stairway, it poses a risk of injury in the event that someone loses their balance while accessing the devices. Additionally, it can complicate accessibility and make it difficult to quickly address any electrical issues. In contrast, while cabinets containing overcurrent protective devices may not be ideal in living areas or above electrical panels for various reasons, the clear safety concern is most pronounced with regard to locations over stairway steps. Locations like basements also can serve practical purposes and can be acceptable for these types of devices, provided they meet other safety code requirements.