The UL design criteria depends on the type of equipment and the application.  There are different UL standards for office equipment, medical equipment, etc.  Your best bet would be to contact UL directly.

-----Original Message-----
>From: kwood716 <[log in to unmask]>
>Sent: Jan 22, 2009 4:20 PM
>To: [log in to unmask]
>Subject: [TN] UL Specs
>
>Hi all,
>
>Can someone tell me which UL standards directly pertain to PCB design?
>
>I know there are specs for trace spacing's and such but do not know which
>ones.
>
>Thanks
>
>Ken
>
> 
>
>
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Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
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