Harley Posted January 30, 2013 Report Share Posted January 30, 2013 Is it permitted to hard pipe a conduit to a control panel when it is mounted on a chiller unit or does it need to be flexed in per the NEC. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted January 31, 2013 Report Share Posted January 31, 2013 Is it permitted to hard pipe a conduit to a control panel when it is mounted on a chiller unit or does it need to be flexed in per the NEC. Does the chiller vibrate? Quote Link to comment Share on other sites More sharing options...
Harley Posted January 31, 2013 Author Report Share Posted January 31, 2013 Not sure if this one does but, most chillers we've dealt with have at some point, be it faulty operation or some other problem have. I just don't remember ever seeing one not flexed in until now and I was just wondering if it was a code violation. In my mind I would treat it like any other piece of equipment with a large motor on it and flex it in. Quote Link to comment Share on other sites More sharing options...
Jim Katen Posted January 31, 2013 Report Share Posted January 31, 2013 Not sure if this one does but, most chillers we've dealt with have at some point, be it faulty operation or some other problem have. I just don't remember ever seeing one not flexed in until now and I was just wondering if it was a code violation. In my mind I would treat it like any other piece of equipment with a large motor on it and flex it in. I don't know of an NEC rule that prohibits it, but good design requires a flex connection at anything that will vibrate. Quote Link to comment Share on other sites More sharing options...
Marc Posted January 31, 2013 Report Share Posted January 31, 2013 Just wondering if this is a medium voltage motor - 1,000 thru 35 kv. Chillers come in big sizes sometimes. Medium voltage may require something better than flex. Marc Quote Link to comment Share on other sites More sharing options...
hausdok Posted February 1, 2013 Report Share Posted February 1, 2013 I recall looking at a pair of these at a converted high school last year when I was taking a commercial inspection course. If memory serves, there were large coil springs and rubber dampers under all four corners of those things to prevent damage during a quake and to accommodate torque movement when they started up. ONE TEAM - ONE FIGHT!!! Mike Quote Link to comment Share on other sites More sharing options...
Harley Posted February 1, 2013 Author Report Share Posted February 1, 2013 It is a 5kv unit and flex is allowed however, some specifications want the flex painted red. Problem solved they claimed it was hard piped in to hold the conduit in place until the flex and connectors could arrive on site. Thank you to all, and have a good weekend! Quote Link to comment Share on other sites More sharing options...
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