National Electrical Code Articles and Information

Code Quiz: Article 422, Part 3

Based on the 2017 NEC

Questions and answers written by Mark Lamendola, who has worked as a master electrician, electrical inspector, and design engineer. Mark is an IEEE Senior Member, and the Code article author for Codebookcity.com. Since 1996, he has been writing National Electrical Code articles for electrical trade magazines and has an extensive portfolio of hundreds of NEC articles.

Article 422 provides the requirements for electrical appliances used in any occupancy, whether residential, commercial, or industrial.

1. If an appliance is rated over 300VA, under what circumstances can you use the branch-circuit switch or breaker as the disconnecting means?
   

2. For cord and plug attachment fitting connected appliances, can you use an accessible separable connector as the disconnecting means?
   
3. What is the minimum value required for the rating of a receptacle or separable connector when connected to an appliance?
   
4. If you use a unit switch (it's part of the appliance) as the disconnect, how must it be marked and what must it disconnect?
   
5. Switches and circuit breakers used as disconnecting means must be of a specific type; what type is that?

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