Peter, I am not interested in 3.2 because it is about mains supply (as you said). I ask about 3.3 because it is about connection of external conductors (at the beginning I understood any conductors, now I'm not sure). If I had 5 conductors I would select 5mm terminal block to have no questions, but I have 40 conductors to connect to small device. Best Regards Piotr
----- Original Message ----- From: peter merguerian <mailto:[email protected]> To: Piotr Galka <mailto:[email protected]> ; [email protected] Cc: EMC-PSTC <mailto:[email protected]> Sent: Tuesday, September 05, 2006 5:31 AM Subject: Re: EN 60950-1 and 3.5mm terminal blocks Piotr, The heading of Clause 3.2 states "Connection to ac mains supply or dc mains supply" Your circuits are in neither of these categories. Therefore, your terminal block can be any size suitable for the current and voltage involved. Best to find a terminal block which is IEC/EN approved and US/Canada approved so as not to subject the terminal block for special testing to 60950-1 (flammability, securemenss, heating, etc.). Best Regards, Peter Piotr Galka <[email protected]> wrote: 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 Ga³ka MicroMade ----- Original Message ----- From: To: "Piotr Galka" Cc: "EMC-PSTC" 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" > > > 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 Ga³ka > > ________________________________________________________________________ > 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 _____ Do you Yahoo!? Everyone is raving about the all-new < ttp://us.rd.yahoo.com/evt=42297/*http://advision.webevents.yahoo.com/mailbeta> Yahoo! Mail. - ------------------------ --------------------------------------- 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 ______________________________________________________________________ - ---------------------------------------------------------------- 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
