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June 2014

TechNet@IPC.ORG

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From:
Robert Kondner <[log in to unmask]>
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Date:
Thu, 26 Jun 2014 10:36:25 -0400
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Creepage is probably OK, it is the Cleavage you want to avoid.

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of TAYLOR Paul R
Sent: Thursday, June 26, 2014 3:28 AM
To: [log in to unmask]
Subject: Re: [TN] z-axis voltage separation

Wow, good find!

 'creepage.com' is probably one of those websites you avoid during work hours. However in this case it seems quite legit!

paul

Paul Taylor
Alstom Grid | R&D | Post Design Service Team Leader
Phone: +44 (0) 1785 223251 (x2014) | Mobile: +44 (0) 7827 312568 | E-mail: [log in to unmask] Office address: St Leonards Avenue, Stafford, ST17 4LX
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Jack Olson
Sent: 25 June 2014 20:19
To: [log in to unmask]
Subject: Re: [TN] z-axis voltage separation

One more valuable link:
Although the subject of this thread was was voltage separation in the z-axis of a PCB, I did find a very useful ONLINE CALCULATOR for Creepage and Clearance per IEC/UL

http://www.creepage.com/

It saves having to wade through the specifications and various tables, and if you are calculating for a PCB construction, select the "IIIa/IIIb" Material Group

simple.
(big thanks to Dave Larusso!)

Jack

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