Dear All I agree with Kevin and would like to add that many States have regulations requiring all electrical/electronic products irrespective of voltage be Listed.
Sent from my iPhone Peter S. Merguerian pe...@goglobalcompliance.com Go Global Compliance Inc. www.goglobalcompliance.com (408) 931-3303 On Nov 16, 2012, at 5:33 PM, Kevin Robinson <kevinrobinso...@gmail.com> wrote: > If the product powered from a certified SELV, power limited supply will be > used or installed in a workplace in the US, then it is subject to OSHA NRTL > approval requirements and the mixer would be required to be certified by an > NRTL. OSHA regulations do not provide an exception to the approval > requirements based on the voltage/current from an external power supply. > > If you have any questions, feel free to contact me directly. > > Kevin Robinson > Engineer & Senior Auditor > OSHA NRTL Program > 202-693-1911 > robinson.ke...@dol.gov > On Nov 16, 2012, at 7:21 PM, Chuck McDowell <chu...@meyersound.com> wrote: > >> In America, a few years ago at Lucent, we built a DSL device that was >> remotely powered by a separate power supply with a NEC ANSI/NFPA 70 Class 2 >> DC output. The power supply had a NRTL safety marking, and as you suggest, >> the DSL device itself did not carry a NRTL safety mark, only EMC and Fcc >> approval marks. >> >> Chuck McDowell >> Meyer Sound Laboratories Inc. >> >> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous, Scott >> Sent: Friday, November 16, 2012 8:36 AM >> To: Mcburney, Ian; emc-p...@ieee.org >> Subject: RE: Product safety requirements >> >> You would need to make sure that the output of the power supply is a Limited >> Power Source in order to deal with fire hazards. The nameplate output >> ratings are necessary but insufficient information to determine if a fire >> hazard may be present. Also, it is possible that your regulators (maybe just >> the boost) could produce voltages internally that would be considered a >> shock hazard, which would require evaluation of the output circuits as SELV. >> There are a wide variety of DC/DC converters commercially available that >> have SELV inputs and SELV outputs which nonetheless still have 3rd party >> safety certifications. You should be able to find a certified one OTS (or >> multiple converters) that will work for you if you don’t want to deal with >> the certification piece yourself. Maybe that defeats the purpose of what you >> are trying to do since you could just as easily find OTS certified AC/DC >> power supplies. >> >> Technical considerations aside, you could always run into trouble with any >> given local authority or customs official wanting to see certification on >> your mixer, not just on the power supply that connects to it or that it >> ships with. >> >> Also, you should be aware that most notebook power supplies nowadays have >> more than just the power output pins – they have feedback signals that are >> intended to keep the supplies in a low power consumption mode when the >> computer is in the off state in order to comply with various efficiency >> regulations. If you don’t provide the right signal, you won’t get power out >> of them. >> >> Scott Aldous >> Compliance Engineer >> AE Solar Energy >> >> +1.970.492.2065 Direct >> +1.970.407.5872 Fax >> +1.541.312.3832 Main >> scott.ald...@aei.com >> >> >> 1625 Sharp Point Drive >> Fort Collins, CO 80525 >> >> www.advanced-energy.com/solarenergy >> >> >> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Mcburney, Ian >> Sent: Friday, November 16, 2012 8:24 AM >> To: emc-p...@ieee.org >> Subject: Product safety requirements >> >> Dear Colleagues >> >> We are a manufacturer of audio mixing consoles with a range that varies from >> A4 size up to large 2m long 2 man lift consoles. >> Most have internal ac/dc power supplies. >> We are researching changing the way we power are future products to >> rationalise the psu range as worldwide approval costs increase. >> One of the options is to purchase 60-80W PC laptop power supplies and power >> the smaller mixers from the DC output of the external laptop supply. >> The DC output voltage from a laptop PSU is typically 19V. However; most >> mixers require typically +/-15V, +10V & +48V internal voltage rails. >> We propose to buck regulate the +/-15V and +10V rails & boost the +48V rail >> from the 19V DC input. >> If the total power consumption of the mixer was no more than 80W and the >> +48V was current limited to no more than 1 Amp, would the mixer require >> approval testing for north America or any other country as the input voltage >> would only be 19V DC. >> Obviously the external ac to dc laptop power supply would have all the >> necessary approvals; probably to IEC60950 and be class 1 construction. >> >> Your opinions would be appreciated. >> >> Thank you in advance; >> >> Ian McBurney >> Design Engineer >> >> Allen & Heath Ltd >> Kernick Industrial Estate >> Penryn, Cornwall >> TR10 9LU >> United Kingdom >> >> +44 (0)1326 370121 >> >> ian.mcbur...@dmh-global.com >> www.allen-heath.com >> A DMH Pro Company. >> >> - >> ---------------------------------------------------------------- >> 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://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 <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> >> >> >> This message, including any attachments, may contain information that is >> confidential and proprietary information of Advanced Energy Industries, Inc. >> The dissemination, distribution, use or copying of this message or any of >> its attachments is strictly prohibited without the express written consent >> of Advanced Energy Industries, Inc. >> - >> ---------------------------------------------------------------- >> 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://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 <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> >> >> - >> ---------------------------------------------------------------- >> 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://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 <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> >> >> ouglas <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> >> > - > ---------------------------------------------------------------- > 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://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 <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> - ---------------------------------------------------------------- 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://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 <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>
