National Electrical Installation Standards

Standards as High as Your Own

Wednesday, May 13, 2020


Thanks for the Code Question of the Day. During the COVID-19 pandemic, this has been a useful forum for me. So, I thought I would submit a question. Can a splice be made in a panelboard? Some say this is a violation. Any guidance would be great.

Thank you,

Eric Summers



Hi Eric,

Thanks for the comments and question. We will try to clear this up for you. A panelboard is defined in Article 100. A panelboard is typically installed within a cabinet and there are restrictions related to splices and conductors passing through enclosures containing panelboards (overcurrent protective devices), which are often cabinets. Section 312.8(A)(2)  indicates that splices in the cabinet shall not exceed 75% of the cross-sectional area of that space in the enclosure. So, the answer is yes you can have a slice within a panelboard enclosure as long as there is Code-compliant space to do so.  

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