What category of equipment does Article 422 specifically address?

Article 422 of the National Electrical Code specifically addresses appliances, which includes various types of equipment designed for consumer use, typically powered by electricity. This can encompass a wide range of devices such as refrigerators, microwaves, and dishwashers that are commonly found in residential and commercial settings.

The focus of Article 422 is essential for ensuring the safe installation and operation of these appliances, which are integral to modern living. It includes guidelines on their wiring, circuit requirements, and installation practices to minimize risks associated with electrical hazards. Understanding the specifics of this article is crucial for electricians as it helps them adhere to safety standards and building codes related to household and commercial appliances.

The other categories mentioned, while important in their own right, are not the primary focus of Article 422. Each has its own distinct articles within the NEC that detail their requirements, such as heating equipment and deicing systems, which highlight the diversity of electrical installations and the need for specialized knowledge in each area.