Hi group!
I need a sanity check on a `new approach' our safety agency has recently taken.
We have an open frame power supply ( has all the certs through the CB report
etc. for EN 60950 UL 1950 )
On of the conditions of acceptability is one mounting standoff shall be
insulated. We have this supply in no less then 4 listed products without any
reference to the flame rating of the standoff having to be checked when the
inspector comes in.
I consider that to be reasonable. section 4.4.3.3 UL 1950 has exception:
"gears, cams, belts, bearings and other small parts which would contribute
negligible fuel to a fire;"
Recently new products have been reviewed and the new procedures require
`traceable 94V-2' standoffs!?!? Which manufacturing engineering says is
difficult to procure a traceable recognized plastic standoff.
Questions:
Has my fever and pneumonia the past weeks clouded my reasoning? What am I
missing? You place a .5 inch #6 standoff between a V-0 board and a medal
chassis what requires a recognized part except maybe `straining out the gnats
so we can swallow the camel' somewhere else.
Sick and Tired
Terry J. Meck
Senior Compliance / Test Engineer
Accu-Sort Systems
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