Thanks for your further advice!
On 4/11/13 1:31 AM, "John Woodgate" <j...@jmwa.demon.co.uk> wrote: > In message <ce9c9e3b.1cda4%scott...@gmail.com>, dated Mon, 4 Nov 2013, > Scott Xe <scott...@gmail.com> writes: > >>> >>>> Is there any other requirement to determine it such as operating >>>> temperature? >>> >>> Not exactly 'determine'. Some standards require parts above a specified >>> temperature (or temperature rise) to be inaccessible. >> >> Can you give me an example or two. Thanks! > > I don't know which standards you have. IEC 60065, for example, gives > maximum temperature rises for various different accessible parts. > Therefore, if a part is too hot, it must not be accessible >> >>>> >>>> Recently we notice there are dielectric strength tests for LED lamps >>>> and compact FL lamps but no dielectric strength tests required for >>>> halogen lamps. Actually they all have glass bulb and all are operating >>>> on 230 Vac. Isn?t glass bulb considered as an accessible parts on >>>> halogen lamp due to high operating temperature? >>> >>> A dielectric strength test is probably not required because any halogen >>> lamp that is not broken would pass it. With an intact lamp, there are >>> two layers of insulation - the glass and the vacuum. >> >> For double insulation, dielectric strength test is still required in >> general but it doesn't. > > Look at the first sentence. No intact lamp would fail the test. The > second sentence just points out that this is because there are two very > good layers of insulation in an intact lamp. - ---------------------------------------------------------------- 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 <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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
