John: Sorry I can't help, but I am interested in what replies you get.
I also wonder what force the Decision carries. Is it a mandatory part of the Low Voltage Directive? How does it relate to the LVD or to the various EN's in force under the LVD? Thanks in advance for any light you can shed on these murky waters! Regards, Jim Eichner Statpower Technologies Corporation jeich...@statpower.com http://www.statpower.com Any opinions expressed are those of my invisible friend, who really exists. Honest. > -----Original Message----- > From: Boucher, John [SMTP:j...@bighorn.dr.lucent.com] > Sent: Monday, December 14, 1998 9:07 AM > To: 'emc-p...@ieee.org' > Subject: Varistors to ground > > All: > > I have received a copy of a CENELEC Decision (dated 6/98) regarding > the use > of varistors between mains conductors and ground. This particular > Decision > is written in a rather unclear fashion (at least its unclear to me...I > tend > to be rather literal in my interpretations of written requirements), > and I > am struggling with defining the actual requirements. > > If anyone out there has received this Decision, and believes they are > clear > about what the actual bottom line requirements are, please let me > know. I > have muddled through some of the issues, but need some confirmation on > a > couple of points (see the questions below). It may seem to some that > the > answers to these questions are straight-forward in the Decision, but I > have > studied this Decision (maybe too much) and find these points unclear. > > 1) Is this Decision only for pluggable equipment type A, or is the > spark-gap > / fuse requirement in effect for pluggable equipment type B as well? > > 2) Will Denmark, UK, and Sweden accept varistors to ground if the > circuit > contains a spark-gap and two fuses? > > 3) The installation instructions for our PABX systems include the > requirement for a permanently connected ground wire between the > equipment > ground and an approved building ground (this ground wire is in > addition to > the "green wire" lead in the AC mains). This wire is required for all > our > PABX systems (AC and DC powered systems, pluggable type A, type B, and > permanently connected systems). Does this permanent ground connection > provide an exemption to this Decision? > > If this Decision means DK, UK, SE will simply not accept varistors to > ground, then a lot of small pluggable type A equipment intended for > sale in > DK, UK, SE will have to either: 1) discontinue using varistors, or 2) > become > pluggable equipment type B (which would be onerous, given the IEC 309 > plugs > I've seen). > > > Thanks for the help. > > John Boucher > jpbouc...@lucent.com > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to majord...@ieee.org > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to ed.pr...@cubic.com, > j...@gwmail.monarch.com, ri...@sdd.hp.com, or > roger.volgst...@compaq.com (the list administrators). --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
