From: Glenn Ashmore
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Subject: Re: PCB trace width/capacity question
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NNTP-Posting-Date: Thu, 16 Jan 2003 10:14:44 EST
Date: Thu, 16 Jan 2003 10:28:01 -0500
You guys scare me with that temperature rise talk. :-)
Minimum voltage drop being a primary concern, having plenty of room on
the back side and being a firm believer in Gorilla engineering (strong
but ugly), I am going to run .350 down the middle and drop down to the
pins with .200.
Thanks for the mention of hole size. I had not thought about that.
Roger Hamlett wrote:
> You might want to consider a 'bus bar', rather than wire, if the power needs
> to distribute to more than one point. The ones I mean, are the metal 'strip'
> bars, with pins at intervals. These are cheaper to assemble than seperate
> wires, and offer the sort of current rating you require.
> A track to carry this will need to be heavy (about 0.15" typically,
> depending on the temperature rise you can accept), and you must also be very
> careful about the hole sizes chosen (common problem is leaving too much
> clearance between the pins, and the plating in the holes, which when dealing
> with these sorts of current, leads to increased heating at this point...).
> Best Wishes
I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com