ICC Residential Electrical Inspectors Practice Exam

What is the maximum number of service disconnects made up of circuit breakers that can be grouped together?

1. Four

2. Five

3. Six

4. Seven

The correct answer is: Six

The maximum number of service disconnects made up of circuit breakers that can be grouped together is six. This rule is based on the National Electrical Code (NEC), which allows for a maximum of six service disconnects that are in close proximity and can be grouped together in one location for the purpose of servicing and disconnection. When this grouping occurs, the intent is to ensure that these disconnects can be operated at the same time to safely disconnect power to the entire service. The purpose of this limitation is to maintain safety and clarity, ensuring that anyone working on the electrical system can easily and safely isolate the power source. It's important to note that while individual circuits may have different breaker configurations, any configuration exceeding six disconnects could lead to confusion and increased risk during maintenance activities. Therefore, adhering to the six-disconnect limit is critical for safety in residential electrical systems.