After all this discussion, Does anyone know the Mains Voltage in the US. It was once 110 VAC and then 115 VAC. I heard that now it may be 120 VAC Any info would be helpful
-----Original Message----- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate Sent: Wednesday, March 21, 2012 10:48 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Mains voltage in Europe In message <f2c4784e656a4aacaf96ae46d3ac2...@tamuracorp.com>, dated Wed, 21 Mar 2012, Brian Oconnell <oconne...@tamuracorp.com> writes: >I see minimal politics in EMC or safety standards - so they are a >technical standard. You should be there! In EMC, PLT is pure politics, but there are more subtle examples. In fact, 'politics versus engineering' is the wrong way to look at the subject. It's better looked at as 'economics versus technology', and standards committees are increasingly being 'encouraged' (coerced) into addressing economic questions that they are not trained, and not empowered, to answer, thus bearing the blame when everything goes pear-shaped. PLT is an obvious case; if it can be made to work, it could generate gigabucks, some for private enterprise and 20% at least as tax for governments. But at the technology level, it can only be made to work by inconveniencing amateur radio operators, who don't have enough votes to matter. >I see significant 3d and 4th party agenda influence on the >environmental standards - so they can be considered political >standards. So I would like to know what are/were the exogenous >influences on the EU distribution systems that made it a political >voltage? OK, you did ask! The European Commission decided that, like water, natural gas and fuel, electricity is a 'commodity' and thus needs 'quality at the point of delivery' regulations just as the others have. However, while, in principle, a simple 'non-return valve' prevents users from contaminating the other three, users are adept at contaminating the electricity supply with harmonic currents and load current changes that propagate voltage changes through the network, and no 'no-return valve' analogue exists. Also, straying trucks and trees, and wind, rain and snow, affect electricity supplies much more than the others. So the electricity suppliers negotiated EN 50160, a 'quality standard' for electricity. It's not really a standard in the usual sense, because it has so many 'ifs', 'unlesses' and 'excepts' etc. that conformity to it is not very meaningful, but it is a 'political standard'. Even so, nothing much better can be done. Included in it is '230 V +/-10 %'. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK If 'QWERTY' is an English keyboard, what language is 'WYSIWYG' for? - ---------------------------------------------------------------- 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>
