National Electrical Code Articles and Information

Code Quiz: Article 230

Based on the 2005 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..

1. Can a building have more than one service. If not, why not? If so, name at least one criterion for allowing this.
    

2. What is the restriction on supplying service conductors to a building when another building is on that site?
    

3. Name three kinds of clearances you must allow for when running service conductors to the service entrance.
    

4. What kinds of supports must you use for service-drop conductors passing over a roof?
    

5. Complete this sentence. "The two to six disconnects as permitted in 20.71 must be...."