In message <[email protected]>, dated Fri,
24 May 2013, T. Sato <[email protected]> writes:
Maybe a slightly silly question, but I want to hear your opinions.
IEC 61000-4-4:2012 clause 7.3.1 says:
Floor standing EUTs ... shall be placed on a ground reference
plane and shall be insulated from it by an insulating support
with a thickness of (0,1 +/- 0,05) m including non conductive
roller/casters (see Figure 11).
It's known that this clause is inadequate and it will be reviewed, but
probably not very swiftly. It has been pointed out that the capacitance
between the EUT and the ground plane depends on the permittivity of the
support, which is not controlled.
--
OOO - Own Opinions Only. See www.jmwa.demon.co.uk
Why does everything require an odd number of opamps?
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
-
----------------------------------------------------------------
This message is from the IEEE Product Safety Engineering Society emc-pstc discussion
list. To post a message to the list, send your e-mail to <[email protected]>
All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html
Attachments are not permitted but the IEEE PSES Online Communities site at
http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used
formats), large files, etc.
Website: http://www.ieee-pses.org/
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]>
