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Subject:	Re: UL Guidelines
From:	"Harp, Ken" <[log in to unmask]>
Reply To:	(Designers Council Forum)
Date:	Wed, 16 Jun 2010 09:09:54 -0700
Content-Type:	text/plain
Parts/Attachments:	text/plain (42 lines)

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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