On Thu, 10 Sep 2009 17:43:15 +0100, Philip Pemberton wrote:

> I've (finally) found the section on PCB design in AoE -- page 841 in the 
> Second Edition. 10A in a 0.170" wide track on FR4 board with 2oz copper 
> will cause a 10C temperature rise. The same current in a 0.080" wide 
> track will cause a 30C temperature rise. According to the text, "for 
> other copper thicknesses, just scale the widths accordingly." So double 
> the numbers then (10C rise, 10A, 1oz = 0.340").

There are a few sections in 'PCB Design Tutorial' by David L Jones that give
some basic tables for track widths, clearances and rules of thumb (including
some pertaining to altitude).  You can grab a copy from:

http://www.alternatezone.com/electronics/files/PCBDesignTutorialRevA.pdf

Personally I think it's an excellent document on the whole; there's enough
to get started with PCBs and also to use as a reference - a lot of info and
advice packed into one place.

I would've mentioned it earlier but I thought you were after something more
substantial/formal - but IIRC it has a bit more detail (tables) than the AoE
treatment, although it does make a few mentions of 'the relevant legal
standards' but unfortunately gives no reference/source.

Hope this helps anyway.

Regards,

Pete Restall
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