Hi Peter:
There are two schools of thought:
1) Clearance is an independent, stand-alone criterion.
2) Clearance determines electric strength of air and is
an alternate means for determining the electric
strength of air.
If you are in the first school, then there is no reason
to apply the force before or during the electric strength
(or overvoltage) test.
If you are in the second school, then you apply the force
and measure the spacings. If you comply with the spacings,
then apply the electric strength test. If the spacings
were met during the force test, then the electric strength
will be met during the electric strength test.
The requirements apply equally to all circuits; no
exemption for the telecom interface.
Best regards,
Rich
-------------------------------------------------------------
Richard Nute Product Safety Engineer
Hewlett-Packard Company Product Regulations Group
AiO Division Tel : +1 858 655 3329
16399 West Bernardo Drive FAX : +1 858 655 4979
San Diego, California 92127 e-mail: [email protected]
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