John I really don't think the Class comes into this discussion. IP68 denotes protection against solid materials as small as dust and immersion in water to a specified depth >1m without ingress of either to an extent that affects operation of the equipment. In my experience, water and volts do not mix, no matter how little of each. I go diving, and a flooded dive torch is seldom recoverable as just a half-hour or so with volts present is sufficient to completely trash the electrical contacts. Also, we never determine the more stringent IP codes "by design" as too often we have been proved wrong. It is easy to determine say IP20 by design, but IP68 really needs testing. It's quick and not too expensive. Best regards
Neil Barker CEng CEnv MIET HonFSEE MIEEE Manager Central Quality e2v 106 Waterhouse Lane, Chelmsford, Essex, CM1 2QU, England Tel: +44 (0)1245 453616 Mobile: +44 (0)7801 723735 Fax: +44 (0)1245 453571 www.e2v.com <http://www.e2v.com/> P Consider the environment: do you really need to print this e mail? ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of John Allen Sent: 03 September 2009 15:07 To: 'John J Radomski'; [email protected] Subject: RE: [PSES] IP Rating on Class 2 Powered LED Fixture Even if it’s Class 2? The requirements are regarding “hazardous” parts. For the submersion, again, Class 2 and submersing the device will not result in a hazardous situation. John Allen Product Safety Consulting, Inc. 605 Country Club Dr. | Stes. I & J | Bensenville, IL 60106 630-238-0188 | 800-233-7738 | 630-238-0269 (f) [email protected] www.productsafetyinc.com <http://www.productsafetyinc.com> Although PSC maintains the highest level of virus protection, this e-mail and any attachments should be scanned by your virus protection software. It is the responsibility of the recipient to check that it is virus free. PSC does not accept any responsibility for data loss or systems damage arising in any way from its use. This message is confidential and intended only for the individual to whom or entity to which it is addressed. If you are not the intended recipient or addressee, or an employee or agent responsible for delivering this message to the addressee, you are hereby notified that any dissemination, distribution, or copying, in whole or part, of this message is strictly prohibited. If you believe that you have been sent this message in error, please do not read it. Please immediately reply to sender that you have received this message in error. Then permanently delete all copies of the message. Thank you. From: John J Radomski [mailto:[email protected]] Sent: Thursday, September 03, 2009 8:57 AM To: [email protected] Subject: Re: [PSES] IP Rating on Class 2 Powered LED Fixture IP 68 rating provides protection against touching with tools > 1mm and against submertion, so I do not believe that a fixture with user accessible aparts can be IP68 rated.. Best Regards, John "John Allen" <[email protected]> Sent by: [email protected] 09/03/2009 09:43 AM To <[email protected]> cc Subject IP Rating on Class 2 Powered LED Fixture Hi all, If we have a potted LED fixture that is supplied by a Class 2 power supply, can it be rated IP68 based on design vs testing? Even if it is not potted such that low voltage parts are accessible, can it be rated IP68? The version of IEC60529 we have does not have a lower voltage limit. The scope indicates for devices with a rated voltage not exceeding 72.5kV. Any input would be greatly appreciated. John Allen Product Safety Consulting, Inc. 605 Country Club Dr. | Stes. I & J | Bensenville, IL 60106 630-238-0188 | 800-233-7738 | 630-238-0269 (f) [email protected] <mailto:[email protected]> www.productsafetyinc.com <http://www.productsafetyinc.com/> - 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.ieeecommunities.org/emc-pstc 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]> - 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.ieeecommunities.org/emc-pstc 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]> ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - 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.ieeecommunities.org/emc-pstc 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]> Sent by a member of the e2v group of companies. The parent company, e2v technologies plc, is registered in England and Wales. Company number; 04439718. Registered address; 106 Waterhouse Lane, Chelmsford, Essex, CM1 2QU, UK. This email and any attachments are confidential and meant solely for the use of the intended recipient. If you are not the intended recipient and have received this email in error, please notify us immediately by replying to the sender and then deleting this copy and the reply from your system without further disclosing, copying, distributing or using the e-mail or any attachment. Thank you for your cooperation. ______________________________________________________ ________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - 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.ieeecommunities.org/emc-pstc 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]>
