Doug --
Joe Musso, staff engineer at UL, might be worth contacting.
About 10 years ago I was is a similar position with what I considered an
outdated spacings table in UL 1450. Joe was the staff engineer supporting 1450
at the time.
What Joe suggested, and what ended up working out well, was
ilable in Dropbox.
>
>
>
> Best regards,
>
> Rich
>
>
>
>
>
>
>
> *From:* Douglas E Powell
> *Sent:* Tuesday, January 25, 2022 10:27 AM
> *To:* EMC-PSTC@LISTSERV.IEEE.ORG
> *Subject:* [PSES] UL Standards - Old School Spacings
>
>
>
by e-mail. If you are interested in studying
this text, I can make this available in Dropbox.
Best regards,
Rich
From: Douglas E Powell
Sent: Tuesday, January 25, 2022 10:27 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] UL Standards - Old School Spacings
All,
I'm
Sorry all,
I knew the listserv would not support images, but since it regularly sends
me HTML email, I had thought it would allow tables in the body of the email
. Hopefully you'll still get the gist of the email.
~Doug
On Tue, Jan 25, 2022 at 11:26 AM Douglas E Powell wrote:
> All,
>
> I'm
All,
I'm interested in learning the history behind what I call old school
spacings found in UL standards. In recent years there has been considerable
progress toward harmonizing UL spacings to international standards, derived
from IEC 60664-x. However, still today I encounter many UL standards
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