Posted 18 Jun 2019 (edited) Can anyone tell me if there's a rule in NFPA79 consistent with UL508A 60.1. Basically 60.1 states that a main disconnect is not required in an industrial control panel IF the size and type of protection are and clearly stated and that a disconnect is required by the installer, noted on the electrical drawings. Edited 18 Jun 2019 by Bruno1 Share this post Link to post Share on other sites
Posted 19 Jun 2019 NFPA79 chapter 5 talks about the incoming power connection and disconnecting means. Section 5.3 covers the disconnecting means. I'm not 100% sure what you mean, but I don't see many exceptions to the requirement to provide a supply circuit disconnecting means within the enclosure except for panels that are smaller than 2HP and they need one close by and clearly identified. I didn't read the whole section, though. Share this post Link to post Share on other sites
Posted 22 Aug 2022 NFPA79 : 5.1.9.6 Each machine disconnect means other than attachment plugs and receptacles shall be mounted within the control enclosure it supplies OR IMMEDIATELY ADJACENT THERTO. I have one machine that I do not include the disconnect means, the customer/installer must provide the disconnect. And I put this in big letters on my drawings.. Share this post Link to post Share on other sites