Class II != Class 2 Class II construction does not necessarily require that the input or output be rated Class 2/inherently limited/LPS/etc.
An important reason for specifying Class 2/LPS-only input is so that the end-use device will not be a shock hazard (limits on V, VA, A, and touch current as specified by UL1310 and CSA 223). And yes, the 'agency' would have to investigate some equipment, even if the input is only allowed to be an inherently limited source. Brian From: [email protected] [mailto:[email protected]]On Behalf Of American Idle Sent: Wednesday, September 16, 2009 8:50 PM To: Scott Douglas Cc: EMC PSTC Subject: Re: Looking for Source of Requirement The Safety Agency won't have to investigate, for example, the flammability requirements, or the accessability requirements, if a component is powered by LPS only. So either the manufacturer couldn't do, or wouldn't pass, this testing on the product; and as a result, a condition of it's use is that it can only be powered by LPS/Class II supply. -Ken A. On Wed, Sep 16, 2009 at 9:07 PM, Scott Douglas <[email protected]> wrote: To All, I find this statement is a user manual: "This product is intended to be supplied by a Listed Power Unit, marked with “Limited Power Source,” “LPS” and “Class II” on the unit, and output rated ..." The product is usually approved to either ITE (60950) or to A/V (60065) standards. I am curious to know where this requirement comes from, specifically page, paragraph, and rule. I looked in both and did not find it. Can anyone point me to a source? As always, thanks in advance for your help. Kind regards, Scott - 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]>
