Which of the following is NOT a requirement for outside branch circuits?

• A. They must have a suitable drain
• B. They must be rated for wet locations
• C. They must have a disconnect switch
• D. They must only be used in residential settings

Answer: (D)

The statement that outside branch circuits must only be used in residential settings is not a requirement according to the National Electrical Code (NEC). In fact, outside branch circuits can be found in various applications beyond residential, including commercial and industrial settings.

The NEC sets forth requirements for the installation and operation of outside branch circuits to ensure safety and functionality in a variety of environments. For example, circuits must have a suitable drain to prevent water accumulation, which could create hazards. Additionally, these circuits must be rated for wet locations because they are exposed to moisture and various environmental conditions, ensuring their durability and safety. A disconnect switch is also required for outside branch circuits to provide a means to safely disconnect the power for maintenance or emergency situations.

Therefore, the correct choice highlights that outside branch circuits are not confined to residential use, reinforcing the versatility and importance of these circuits in a broader context.