What is the minimum number of AFCI circuit breakers required to be installed in Panel B?

The requirement for the number of AFCI (Arc Fault Circuit Interrupter) circuit breakers in a panel is based on the National Electrical Code (NEC) regulations. These regulations mandate the use of AFCI circuit breakers to enhance safety by protecting against electrical fires caused by arc faults, which can occur in wiring systems.

In residential applications, the NEC outlines specific requirements for the installation of AFCIs. According to these standards, circuits supplying receptacles in dwelling units, specifically in certain living areas like bedrooms and areas serving living spaces, must be protected by AFCI breakers.

The minimum number of AFCIs needed in a panel can vary based on the size and layout of the dwelling, the number of bedrooms, and the total number of branch circuits required for the installation. In the context of the question, if 14 AFCI circuit breakers are specified as the minimum requirement, this indicates that based on NEC guidelines and the size of the dwelling, at least 14 breakers are necessary to provide adequate coverage and protection in critical areas of the home.

Therefore, selecting 14 as the minimum reflects a thorough understanding of the electrical code requirements and the safety measures necessary in residential electrical installations.