NEC Quiz: Article 424, Part 3

by Mark Lamendola

Quiz Questions

Code Quiz: Article 424, 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 424 provides the requirements for fixed electric space-heating equipment.

  1. Can you use a switch as the disconnecting mens, if the installation is in a one-family dwelling and the only other disconnecting means is the service disconnect?

  2. Can a thermostatically controlled switching device also serve as the disconnecting means?
  3. Can you use a branch circuit panel circuit breaker to protect an electric space-heater from overcurrent?
  4. Can you put two heaters on an 80A circuit?
  5. Are the conductors supplying supplementary OCPDs considered branch circuit conductors?

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