Code Quiz: Article 250, Part 7

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. He is a former editor of an electrical magazine were he edited Code articles.

1. What is the maximum number of splices you can put in the system bonding jumper of a separately derived AC system?
    

2. When sizing equipment bonding jumpers per 250.102, on what do you base the size of each jumper?
    

3. How do you ground structural steel and metal piping for a separately derived system?
    

4. What happens if you ground something in an ungrounded system?
    

5. True or false. You must ground the frame of a portable generator to prevent shock.