National Electrical Code Articles and Information

Code Quiz: Article 250, Part 6

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. Which conductor do you ground on a single-phase, three-wire system?
    

2. Which conductor do you ground on a single-phase, three-wire system?
    

3. Can you use just a screw as a main bonding jumper?
    

4. What table do you use to size a main bonding jumper?
    

5. What table do you use to size a system bonding jumper?