No specific limit for the di-electric withstand test. There is no
mention of the term "short" in the di-electric withstand type
test for I.T.

According to CSA engineering guidelines and some UL (Section
General) files, each individual model should have a
pre-determined limit.


From: [email protected] [mailto:[email protected]]On Behalf Of
Robert F. Keller
Sent: Thursday, November 13, 2008 8:36 AM
To: [email protected]
Cc: Robert Keller
Subject: Current limit for Dielectric Test

Hello Group,

I have a question regarding the Electric Strength test in 60950-1
section 5.2.  It says in that section that you have a failure or
the insulation broke down when the current which flows as a
result of the application of the test voltage rapidly increases
in an uncontrolled manner.  So, is there an exact current limit
at which it is considered to have "shorted"?  And if so, is this
printed in any standard?
Any insight in this would be greatly appreciated.

Best Regards,
Rob Keller
Senior Engineer
Communication Certification Laboratory
Ph.: 801.972.6146   Ext.237
Fax: 801-972-8432
[email protected]

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