Which of the following appliances must be labeled and listed for their intended application?

The requirement for appliances to be labeled and listed for their intended application is critical for safety and compliance with regulatory standards. When all appliances regulated by the code are labeled and listed, it ensures that these devices have been tested and meet specific safety and performance standards established by recognized authorities.

This labeling is essential for various reasons, including providing consumers with the assurance that the appliances they are using are safe and suitable for their designated use. It also helps in maintaining standards across different types of appliances, whether they are used in residential or commercial settings. By being labeled and listed, these appliances allow for better identification of their specifications, intended use, and compliance with local codes.

In comparison, only focusing on residential or commercial appliances, or appliances with special features would not encompass the breadth of all appliances that might require adherence to safety standards. Regulatory codes may apply widely, affecting both residential and commercial applications, and potentially include appliances designed for unique applications, emphasizing that the requirement is universal across all regulated appliances.