National Electrical Code Articles and Information

Code Quiz: Article 250, Part 12

Based on the 2008 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. When you enclose grounding electrode conductors, what requirement do ferrous enclosures have to meet that non-ferrous enclosures don't?
    

2. What table serves as the reference for sizing grounding electrode conductors for AC systems?
    

3. The connection of a grounding electrode conductor or bonding jumper to a grounding electrode must be made in a manner that ensures what?
    

4. Can you connect more than grounding electrode conductor to a grounding electrode?
    

5. Do you want to keep other metal enclosures separately grounded from service enclosures or do you bond them to the grounding electrode system?