The Note says 'should', which is why the capacitor specification need to
be checked.
John Woodgate OOO-Own Opinions Only
J M Woodgate and Associates www.woodjohn.uk
Rayleigh, Essex UK
On 2017-11-18 00:45, Richard Nute wrote:
Hi Jon:
“Is the same thing true for the ratings of an X2 rated capacitor; is
the 250VAC rating a nominal rating, where the part expected to support
250VAC+10% say?”
IEC 60384-14 says:
*2.2.3 Rated voltage (**/U/**R**)*
The preferred values of rated voltage are 125 V, 250 V, 275 V, 400 V,
440V, 500 V and
760 V.
NOTE 1 X-capacitors can be used in a star connect.
NOTE 2 Electromagnetic interference suppression capacitors should be
chosen to have a rated voltage equal to,
or greater than, the nominal voltage of the supply system to which
they are connected. The design of the
capacitors should take into account the possibility that the voltage
of the system may rise by up to 10,% above its
nominal voltage.
The answer is “yes.”
Best regards,
Rich
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