National Electrical Code Articles and Information

Code Quiz: Article 408, Part 1 of a series

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.

1. How must conductors and busbars of switchboards must be held in place?

2. What's the purpose of barricades installed in service panelboards, switchboards, and switchgear?
   
3. Can you run conductors through a vertical section of a switchboard if they don't terminate there?
   
4. What kind of jumper must you supply to every switchboard, switchgear, and panelboard used as service equipment?
   
5. What's the phase arrangement for three-phase buses?

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