The NEMA 4 test is about 5 psi. The IPX6 test is about three times that pressure. Less flow but higher pressure. In my opinion, a more severe test.
Sent from Bill Lawrence's iPhone > On Jun 10, 2016, at 1:48 PM, Gary McInturff <gary.mcintu...@esterline.com> > wrote: > > Hey Don, > Thank you for the information very enlightening and surprising. I was going > to have my ME’s check the pressure (force) because the unit under test will > be an unsupported touch panel assembly and I was a bit concerned that the > water pressure would distort the touch sensors and pull them free of the > bezel. If that was the case I was thinking about 3D printing a backstop for > the panel. (We don’t have the full assembly at this plant so doing the test > on a subset of the equipment) > > Again thank you for the effort and for teaching me something new > Gary > > From: Gies, Don (Nokia - US) [mailto:don.g...@nokia-bell-labs.com] > Sent: Friday, June 10, 2016 10:17 AM > To: Gary McInturff; EMC-PSTC@LISTSERV.IEEE.ORG > Subject: [EXTERNAL] RE: slightly off target but NEMA 4 > > Gary, > > The short answer for the difference in tests is because the NEMA 250 and IEC > 60529 standards evolved separately and became the norms for North America and > the rest of the world, respectively. > > A mechanical engineer colleague of mine once pointed out that the pressure > coming out of the nozzle for the IPX6 test nozzle, 100 liters per minute > through a 12.5 mm diameter circular opening, is actually higher than that of > the NEMA Type 4 Hosedown Test, conducted at 240 liters per minute (65 gallons > per minute) through a 25 mm (1 inch) diameter circular opening. I can > confirm this because when we put a set-up in our facility at Bell Labs, > Murray Hill, NJ by having a fire-hose spigot put into the main water line, we > had enough water pressure to conduct the NEMA Type 4 Hosedown Test, but not > enough to conduct the IPX6 test. We installed a fire pump in the water line > to boost the pressure up in order to conduct the IPX6 test. > > Best regards, > > DON GIES > NOKIA Bell Labs > SENIOR PRODUCT COMPLIANCE ENGINEER > GLOBAL PRODUCT COMPLIANCE LABORATORY > 600-700 Mountain Avenue > Room 5B-104 > Murray Hill, NJ 07974-0636 USA > Phone: +1 908 582 5978 > Mobile: +1 732 207 7828 > don.g...@nokia-bell-labs.com > > > From: Gary McInturff [mailto:gary.mcintu...@esterline.com] > Sent: Friday, June 10, 2016 12:51 PM > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: [PSES] slightly off target but NEMA 4 > > Have a request from a customer to do a NEMA 4 Spray test. I had always > equated NEMA and the EU IPX series as roughly equivalent – and in fact have > pumps and equipment to do the IPX6 test but was double checking to see that > it was sufficient for NEMA 4. Turns out NEMA is about double the flow > requirement of IPX6 requiring 65 gallons per minute. Yikes! Anybody know a > reason why that, to me, outrageous flow rate. > > I’ll get the pumps etc. but that just seems way overkill so I’m just trying > to put some reasoning behind the number. > > > Gary McInturff > Reliability/Compliance Engineer > > > > > > Esterline Interface Technologies > Featuring > ADVANCED INPUT, GAMESMAN, LRE MEDICAL, and MEMTRON products > 600 W. 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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>
