I read in !emc-pstc that michael.sundst...@nokia.com wrote (in
<57a26d272f67a743952f6b4371b8f81101e42...@daebe007.americas.nokia.com>)
about 'Surge Suppressors on a UPS' on Mon, 2 Jun 2003:
>    I also don't understand the prohibition of an extension cord. Maybe 
>    this is a legal issue, as I can't see any valid safety or 
>    regulation issues here. We regularly put a UPS in the bottom of a 
>    rack system, and then wire a stripline outlet set for the height of 
>    the rack. Isn't that the electrical equivalent of an extension 
>    cord? What am I missing?

I think you are right. The advice is a cop-out. A surge suppressor on
the output of a UPS should, in theory, never be activated. But something
outside the spec of the UPS, such as a close lighting strike, might
activate it and perhaps damage the UPS. 

Banning extension cords (without surge suppressors) is bizarre and
inexplicable. I see the leaden hand of the corporate attorney there.
>

-- 
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:               emc_p...@symbol.com

For policy questions, send mail to:
     Richard Nute:           ri...@ieee.org
     Jim Bacher:             j.bac...@ieee.org

Archive is being moved, we will announce when it is back on-line.
All emc-pstc postings are archived and searchable on the web at:
    http://www.ieeecommunities.org/emc-pstc

Reply via email to