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Tuesday, May 2, 2023

Question:

Hi Charlie. Are Industrial Control Panels required to have a disconnect switch? Regards, Ron Erbe
A

Answer:

Hello Ron. In general, the need for a disconnecting means will be tied to the equipment the industrial control panel is controlling. For example, if the load being controlled, then Section 409.30 points to Part IX of Article 430 for Motor disconnecting requirements. Additionally, Section 409.21(B)(1)-(2) requires each incoming supply circuit to have overcurrent protection either ahead of the industrial control panel, or single main overcurrent device installed inside of the industrial control panel.

ABOUT CQD: The Code Question of the Day (CQD) is NECA and ELECTRICAL CONTRACTOR Magazine’s flagship National Electrical Code (NEC®) public forum for the industry, sponsored by EATON. The daily distribution of Q&A generates a lively dialogue and shares relative Code-based practical responses.

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CHARLIE TROUT: Charles M. Trout, better known as Charlie, was a nationally known NEC® expert and author. He served on several NEC® technical committees and is past chairman of CMP-12. In 2006 Charlie was awarded the prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development, and technical training. Even though Charlie passed away in October of 2015, his work continues in spirit. NECA continues to maintain this question forum for its many subscribers in memory and recognition of all his significant contributions to making the NEC what it is today.

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IMPORTANT NOTICE: Unless the question requests a response based on a specific edition, all answers are based on the latest edition of NFPA 70® National Electrical Code®.

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