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September 1998

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Content-Type:	text/plain; charset="iso-8859-1"
Sender:	DesignerCouncil <[log in to unmask]>
Subject:	Re: FW: pcb design rules
From:	"Uptain, George" <[log in to unmask]>
Date:	Fri, 18 Sep 1998 13:20:03 -0500
MIME-Version:	1.0
X-To:	Ken Brown <[log in to unmask]>
Reply-To:	"DesignerCouncil E-Mail Forum." <[log in to unmask]>, "Uptain, George" <[log in to unmask]>
Parts/Attachments:	text/plain (52 lines)

The new spec that replacedd IPC-D-275 has newer instructions for caluclating spacing for voltage above 500v.
IPC-2221 says to start with the spacing for 500.  Since you said pads to pins that'd probably mean uncoated.  So lets use 1.5mm for the first 500v.  Now apply .00305mm per volt to the difference of your 2000 and 500.  1500*.00305mm=4.575mm.
So you need 6.075mm or about .239" spacing.

Regards;
George Uptain - Schlumberger Oilfield Services
Austin, Texas
[log in to unmask] (512)331-3183

-----Original Message-----
From: Ken Brown [mailto:[log in to unmask]]
Sent: Friday, September 18, 1998 12:13 PM
To: [log in to unmask]
Subject: [DC] FW: pcb design rules


-----Original Message-----
From: Ken Bown [mailto:[log in to unmask]]
Sent: Friday, September 18, 1998 12:10 PM
To: [log in to unmask]
Subject: pcb design rules


LOOKING FOR DEESIGN RULES FOT PCB LAND SPACING VS VOLTAGE  NEED TO APPLY 2KV
BETWEEN LANDS AND CONNECTOR PINS.
REGARDS, KEN BOWN
DELTA V INSTRUMENTS
RICHARDSON. TX

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