Hi Peter:


>   Unless the power supply has a CB Test Report of its own (and 
>   most do not!) 

As a matter of course, if we are going for a CB on the
end-product, then we request a power supply CB as a part
of doing business with the power supply vendor/manufacturer.

Power supply safety certifications, including the CB, are
included in our purchase spec.  Of course, we must pay for
the CB, but we don't need to do the work, and we don't need
to interface between the power supply manufacturer and the 
certification house.

The biggest issue is timing.  In my experience, power supply
manufacturers are reluctant to submit until very late in the
design cycle.  Usually, we start our end-product submittal
BEFORE we have the CB in hand.  Our cert houses won't issue
the end-product CB without the power supply CB.  And, we run
a slight risk that the power supply "conditions of 
acceptability" might require us to do more testing.  But, for
the most part, we anticipate those tests and perform them 
whether they are needed or not.  In this way, we get our CB
on time.

>                                      Now imagine a manufacturer had 
>   more than one or altenate power supplies in his product. 

Yes.  Been there, done that.  No big deal.  It makes your 
end-product CB Test Report VERY LARGE!  Each CB Test Report
is about 60-70 pages, so you get the end-product report 
PLUS two alternate power supplies and about 200 pages!

Biggest problem is reproducing the report for each additional
country submittal and certification!


Best regards,
Rich




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