And in the telecom world we frequently used multiple AC cords, each one going to an outlet served by a different circuit breaker to make sure the switch or multiplexer did not go down. They fed individual power supplies that fed a common power bus. Covered by IEC 950 and later standards. Needed a warning that there were multiple power cords. Seems odd that IEC 950 and derivatives would cover this situation but not 61010!
Dan From: Richard Nute [mailto:[email protected]] Sent: Thursday, April 6, 2023 8:15 PM To: [email protected] Subject: Re: [PSES] Multiple electrical power sources Hi Steve: The TV broadcast industry electronic products have used two (redundant) AC sources for their products for many years. You may have some help there. Rich From: Steve Brody <[email protected] <mailto:[email protected]> > Sent: Thursday, April 6, 2023 1:42 PM To: [email protected] <mailto:[email protected]> Subject: [PSES] Multiple electrical power sources A new question. A client's product is using two independent AC power sources on a product, but I can't find anything in 61010-1 60204-1 that provide any guidance on compliance. The obvious is that the sections of the product that are fed from source A or B are not interrelated in any way that would create a hazard for for the other section, that there be a warning label adjacent to each input that says there are multiple AC sources, and that each section has it's own circuit protection and disconnect, even if a facility disconnect is used for both. What am I missing? Thanks, Steve Brody [email protected] <mailto:[email protected]> C - 603 617 9116 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected] <mailto:[email protected]> > All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) <http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Mike Cantwell <[email protected] <mailto:[email protected]> > For policy questions, send mail to: Jim Bacher <[email protected] <mailto:[email protected]> > David Heald <[email protected] <mailto:[email protected]> > _____ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC <https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1> &A=1 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html 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: Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
