Hi John Thanks for the response and the general update on the situation - as for the reference to the committee number, it was LEL/105 when I was there but I have'nt followed its progress since then.
Regards John Allen ----- Original Message ----- From: "John Woodgate" <j...@jmwa.demon.co.uk> To: <emc-p...@majordomo.ieee.org> Sent: Friday, August 30, 2002 11:26 AM Subject: Re: Electric Fence Controllers > > I read in !emc-pstc that John Allen <ja014d7...@blueyonder.co.uk> wrote > (in <048001c24f9d$bd8895a0$0200a8c0@johnallen>) about 'Electric Fence > Controllers' on Thu, 29 Aug 2002: > >I once (about 12 years ago) had the dubious priviledge of being the Comittee > >Secretary for the UK BSI standards committee dealing with these beasts at > >British & International levels! > > What is now CPL/61? > > > >This question was never asked (that was probably before my time!) but it was > >my impression that these had fallen into the "too difficult" category and > >the Commission at the time of the Directive (1972/73)ducked the issue to > >ensure that it got agreed and that all the more common items got dealt > >with.. > > I think you are right. > > > >There certainly was (and probably still is - which is why the situation in > >the Directive does not appear to have changed) > > Item 10 of the Commission 'request for comment document 'LVD Update 1' > says: > QUOTE > General support to include "Electric fence controller" to the scope of > the LVD. > > France: Objection because the intended use of these products is not > inline with the aims of the directive. > > ENDQUOTE > > >a considerable difference of > >opinion between various countries as their safety and what the voltage and > >particular pulse tim/energy limits should apply. > > Indeed. Related to the perimeters of typical fields. > > > >Effectively, countries with small fields (like many in Europe) wanted low > >power units which probably were safe enough for general use, and possibly > >could have been kept within the LVD by some form of energy limitation kluge. > >However, countries with "big" - or "very big" (like Australia and New > >Zealand, etc.) - fields wanted units with lots more energy to avoid the > >deterent effect being substantially reduced by contact with conductive > >vegetation, etc. > > Of course, at agricultural shows in Britain, they are demonstrated > producing 5 cm sparks. I wonder how they do that. (;-) > > > >In the end (after I left BSI) I believe that some units were finally covered > >under Part 2 Sections of IEC 60335 - but I personally doubt that they are > >the high power versions. > > BS EN 60335-2-76. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > Interested in professional sound reinforcement and distribution? Then go to > http://www.isce.org.uk > PLEASE do NOT copy news posts to me by E-MAIL! > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ > > To cancel your subscription, send mail to: > majord...@ieee.org > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: emc-p...@hypercom.com > Dave Heald: davehe...@attbi.com > > For policy questions, send mail to: > Richard Nute: ri...@ieee.org > Jim Bacher: j.bac...@ieee.org > > All emc-pstc postings are archived and searchable on the web at: > http://ieeepstc.mindcruiser.com/ > Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
