What is the general rule for the number of circuits within a dwelling?

The general rule for the number of circuits within a dwelling is to provide at least one circuit for each major appliance or area. This guideline ensures that sufficient capacity is available to properly power essential equipment, reducing the risk of overloading any single circuit. Major appliances such as refrigerators, ovens, washers, and HVAC systems typically require dedicated circuits to function safely and effectively.

This approach helps to enhance safety and reliability within the electrical system of the home, as each significant load is well supported by its own circuit. Adequate circuits also facilitate better management of the electrical load, preventing disruptions caused by tripped breakers due to overloaded circuits.

The other options suggest varying criteria that do not fully encompass the needs presented by the diverse electrical loads found in a residential setting. For instance, specifying a fixed number of circuits per room or a specific square footage doesn't take into account the actual draw of equipment and appliances that may vary significantly from one space to another. Thus, the clear guideline of providing one circuit for each major appliance or area is the most practical and commonly accepted principle in residential electrical planning.