If it's true, it's a very serious mistake. Without that special
definition, everyone would take it to have the normal meaning of 'not
electrically conductive', as it clearly means in 3.1.9, 6.3.2, A.2.2.2
and A.2.2.3. Obviously, an electrically-conducting sheet would change
the magnetic field because eddy currents would flow.
Best wishes
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
The UK is a sovereign state, not a Zollverein state
On 2019-05-13 21:36, Richard Georgerian wrote:
Greeting colleagues,
In IEC 61000-4-9, Section 7.3 it states the following –
“Table-top EUT’s shall be placed on a non-conductive table.”
Up until now, I have always thought that “non-conductive” had meant no
metals, such as iron, steel, aluminum, copper, etc. In that meaning,
the table would then be made of wood, foam, etc. However, I have been
advised that for this particular case of impulse magnetic field
immunity test, that “non-conductive” is referring to material that
should not be magnetic conductive, such as aluminum or copper. Iron
and steel would not be used, as these are considered magnetic
conductive. And therefore, an aluminum or copper sheet would be placed
on the table under the EUT.
The standard does not provide guidance as to the use of
“non-conductive” that would mean in essence, “should not be magnetic
conductive”.
Any guidance and insight would be most helpful.
Thank-you,
Richard Georgerian
Applications Engineer
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