IEC60950 has a requirement (1.6.4) that "the neutral conductor, if any, shall be insulated from earth and from the BODY throughout the equipment as if it were a line conductor. Components connected between neutral and earth shall be rated for the line-to-neutral voltage".
Typically I would expect IT equipment to be safe if line and neutral were reversed, except for the issues relating to a single pole disconnect device and fusing. Regards, John Crabb, Development Excellence (Product Safety) , NCR Financial Solutions Group Ltd., Discovery Centre, 3 Fulton Road, Dundee, Scotland, DD2 4SW E-Mail :john.cr...@scotland.ncr.com Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. -----Original Message----- From: Price, Ed [mailto:ed.pr...@cubic.com] Sent: 20 February 2002 16:09 To: 'EMC-PSTC List' Subject: RE: South Korean Power System Hi Listmembers! I asked a general question yesterday about Korean AC power, but now I have a little better idea about what I need to discover. One of our field engineers said that AC power at South Korean military bases used the SCHUKO style outlet system. But he said that one of the power pins was somehow referenced to the safety ground. Thus, one pin to safety ground was 220 V, the other pin to safety ground was 0 V. Can anyone confirm this? And if so, which pin is the "hot" pin? John Woodgate pointed out that SCHUKO plugs are symmetrical, and can be plugged in two ways. That seems to imply that even if one pin is referenced to safety ground, the appliance manufacturer must design his device to accept the plug connected either way. I think that means the appliance manufacturer must then design for the possibility that either input powerline might be hot. Comments? Thanks again, Ed >-----Original Message----- >From: Price, Ed >Sent: Tuesday, February 19, 2002 4:12 PM >To: 'EMC-PSTC List' >Subject: South Korean Power System > > > >Hi Listmembers: > >Can anyone tell me which is the correct electrical wiring >commonly used for >South Korea? I understand that the power is 60 Hz, 220 Vrms. > >I believe that two types of outlets are common there. First is >a two round >pin, round connector. This does not have a safety ground >connection. Second >is a "SCHUKO" type outlet, with two round pins and two safety >ground tabs. >(A 2-pin plug, without a safety ground, can also plug into >this outlet.) > >Are both wires floating off of ground? Or is one of the power conductor >wires tied to safety ground? And, if one conductor is >grounded, as you face >into a socket, is it the left or right contact? > >Thanks, > >Ed > > >Ed Price >ed.pr...@cubic.com >Electromagnetic Compatibility Lab >Cubic Defense Systems >San Diego, CA USA >858-505-2780 (Voice) >858-505-1583 (Fax) >Military & Avionics EMC Services Is Our Specialty >Shake-Bake-Shock - Metrology - Reliability Analysis > ------------------------------------------- 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...@mediaone.net 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...@mediaone.net 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"
