UL 508A covers industrial control panels and has something to do with the consistency. Also, many manufacturers sub-out their control panel design and fabrication to assy shops that are approved to build panels to UL 508A so naturally the work done by these sub-contract shops is going to be similar. That should explain some of it.
-Dave From: IBM Ken [mailto:ibm...@gmail.com] Sent: Tuesday, April 04, 2017 9:15 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] E-Box Layout on Factory Machines I think those types of products are engineered once, and then built and serviced for decades. Overly neat designs lend themselves to less problems in production and service over the years, even when the original designers are no longer available to help. I don't think there are any criteria which require that type of construction (aside from tradition). It's like asking why every facilities engineer has a large keyring, a pocket protector containing no less than three writing instruments, and a AA mini Maglite on their belt. On Tue, Apr 4, 2017 at 8:54 AM, Kunde, Brian <brian_ku...@lecotc.com<mailto:brian_ku...@lecotc.com>> wrote: I notice that most industrial factory machinery is designed with a large metal electronic box with a hinged door and some kind of keyed lock. Inside the components are DIN mounted and the wiring is all dressed very neatly in these gray plastic cable runs with snap-on lids. Every wire is labeled with a small tag. Why are these machines so similar in design? Even among different manufacturers, they look similar. Is there a standard or standards that dictate exactly how this is done? What criteria is used to determine if your product must follow these construction rules? Seems strange to me that they are so similar and if required to be that way, then standards and/or governments are dictating design. Even if it was for the “greater-good”, I thought that was a no-no. Dictate design, stifle creativity, invite those who would take advantage for financial gain. Just curious. I’m most interested in the criteria question, though. The Other Brian ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. 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To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
