John, Should I understand that existence of separate Cl. 3.5 about interconnection means that 'external conductors' in Cl. 3.3 title are not interconnection ones (only mains and earthing) ?
Is my DC 12V 0.2A power connection (external DC LPS = not DC MAINS SUPPLY) an interconnection (3.5) allowing me for 3.5mm terminal blocks for it, or I must use bigger ones as I understand Cl.3.3 ? Piotr Gałka MicroMade ----- Original Message ----- From: <[email protected]> To: "Piotr Galka" <[email protected]> Cc: "EMC-PSTC" <[email protected]> Sent: Thursday, August 31, 2006 3:53 PM Subject: Re: EN 60950-1 and 3.5mm terminal blocks > Piotr, > > Cl. 3.5 (interconnection) should give you some guidance. > > John Radomski > Principal Engineer > Schneider Automation Inc. > > > > > "Piotr Galka" > <piotr.galka@micr To: "EMC-PSTC" > <[email protected]> > omade.pl> cc: > Sent by: Subject: EN 60950-1 and > 3.5mm terminal blocks > [email protected] > > > 08/31/2006 07:44 > AM > > > > > > > All, > > Can I use 3.5mm terminal blocks in device under EN 60950-1 ? > > Device is powered by 12V DC LPS source. > For connecting external signals (5V OC 2mA) cables with 0.5mm diameter > wires (0.2mm2) are used. > Each conductor is single wire so I understand these are not flexible > cords. > > 3.5mm terminal blocks accept 0.14mm2 to 0.75mm2, but EN 60950-1 3.3.4 > needs for other cables > (as not flexible cords than other) terminals accepting up to 2.5mm2. > It looks that it is for all connections because: > 3 Wiring, connections and supply > 3.3 Wiring terminals for connection of external conductors > 3.3.4 Conductor sizes to be connected. > > I also worry if standard 3.5mm terminal blocks agree with EN 60950-1 > 3.3.6: "Terminals shall be > so designed or located that the conductor cannot slip out when the > clamping screws or nuts are > tightened." > > Do 5V 2mA signal lines really need so much care or I missed something. > > Thanks in advance. > > Piotr Gałka > > ________________________________________________________________________ > This email has been scanned for SPAM content and Viruses by the MessageL > abs Email Security System. > ________________________________________________________________________ > - ---------------------------------------------------------------- This > message is from the > IEEE Product Safety Engineering Society emc-pstc discussion list. Website: > http://www.ieee-pses.org/ > > > To post a message to the list, send your e-mail to [email protected] > > > 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 [email protected] Mike Cantwell [email protected] > > > For policy questions, send mail to: > > > Jim Bacher: [email protected] David Heald: [email protected] > > > All emc-pstc postings are archived and searchable on the web at: > > > http://www.ieeecommunities.org/emc-pstc > > - > ---------------------------------------------------------------- > This message is from the IEEE Product Safety Engineering Society > emc-pstc discussion list. Website: http://www.ieee-pses.org/ > > To post a message to the list, send your e-mail to [email protected] > > 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 [email protected] > Mike Cantwell [email protected] > > For policy questions, send mail to: > > Jim Bacher: [email protected] > David Heald: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > > http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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 [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
