Andy, A poor description on my part. Sorry. Each power cord will be powering separate internal circuits separated by reinforced insulation. However, the two internal circuits are in the same compartment; not physically separated; meaning that both power cords or AC Mains Inputs have to be disconnected to be safe for servicing.
Thanks for the replies I have received so far. The Other Brian -----Original Message----- From: Andy Clifford [mailto:[email protected]] Sent: Thursday, June 02, 2011 9:30 AM To: Kunde, Brian; [email protected] Subject: RE: [PSES] Dual Power Cords This does not comply with 60335-1 clause 25.1; what if one plug is disconnected when the other is connected (accessible plug pins)? The requirement is for 1250V separation between both circuits. Andy Clifford -----Original Message----- From: Kunde, Brian [mailto:[email protected]] Sent: 02 June 2011 13:40 To: [email protected] Subject: [PSES] Dual Power Cords We have received a request by our customers to change our product (about half the size of a household refrigerator) from one high current power cord (plug/receptacle/branch circuit) to two power cords using standard 15 amp receptacles (on separate circuits) to avoid having to do special facility wiring for the high current receptical. What safety considerations are there in doing this? Internally, one circuit would power a heater, the other would power our electronics. The circuits are not separated in any way in the enclosure so both AC Mains circuits or power cords will have to be disconnected to make it safe to service. Your input would be appreciated. Here is what we are thinking: 1. Input rating labels by each power entry location. 2. Warning label to remove BOTH power cords before servicing. 3. Using two dual pole circuit breaker/switches (disconnect device) mechanical linked together so when you turn off the switch all circuits are powered down. Is this doable? Thanks, The Other Brian ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]> ________________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
