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June 2010

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Subject:
Re: UL Guidelines
From:
"Holley, Gregory (H USA)" <[log in to unmask]>
Reply To:
(Designers Council Forum)
Date:
Thu, 17 Jun 2010 07:07:06 -0400
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 T,
You might also want to check
IEC 61010-1 (Formerly IEC 1010-1)
Safety document gets into separation and isolation.
Greg



-----Original Message-----
From: DesignerCouncil [mailto:[log in to unmask]] On Behalf Of
Harp, Ken
Sent: Wednesday, June 16, 2010 12:10 PM
To: [log in to unmask]
Subject: Re: [DC] UL Guidelines

Todd,

Try IPC-2152, "Standard for Determining Current-Carrying Capacity in
Printed Board Design".  This may help you with trace widths from a
standpoint keeping the board temperature down (power dissipated in the
traces due to I2R losses).  For component separation and dielectric
breakdown strength (e.g. for the 120-240 VAC portions of the board) you
will need to keep looking.

R/

Ken Harp

-----Original Message-----
From: Todd Richardson [mailto:[log in to unmask]] 
Sent: Wednesday, June 16, 2010 8:13 AM
To: [log in to unmask]
Subject: [DC] UL Guidelines

I am designing a power supply pcb 120-240 VAC to +/-12 VDC.
Can anyone point me to UL guidelines for this pcb design?
Any advice on trace width etc.?
Thanks

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