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National Electrical Code Articles and Information

NEC Quiz: Article 406

by Mark Lamendola

Quiz Questions

Code Quiz: Article 406, Part 3 of a series

Based on the 2014 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 Since 1996, he has been writing National Electrical Code articles for electrical trade magazines and has an extensive portfolio of hundreds of NEC articles.

Receptacles seem easy enough to install, but Code violations with them are actually quite common. So is poor workmanship. Article 406 provides the requirements for receptacles, cord connectors, and attachment plugs (caps). Take our quiz to see if you understand and can correctly apply these requirements.

  1. What must receptacle faces be flush with?

  2. In what orientation can a countertop receptacle not be mounted?
  3. Receptacle faceplates must be installed to meet what criterion?
  4. Your cousin wants you to install an outdoor receptacle in his covered porch. There's no chance that snow or rain will hit the receptacle. Is there anything special you need to do to protect this receptacle since the porch already protects it from the elements?
  5. What is the minimum vertical clearance when installing a receptacle over a bathtub?

Answers to this quiz are here: Answers to this quiz

See how you did!