> > http://www.circuitboards.com/capacity.php3
> >
> Interesting -- by this chart, as temp increases, the current
> capacity also increases.  I would've thought otherwise.
>
> Cheers,
> -Neil.
>


You're reading the chart inside-out.

What they mean by the chart is that with a trace with of X carry Y amperes
you'll get a temp rise of 10 degrees C.

Thus, if you allow a temp rise of 20 degrees C instead, then you can handle
more current.

Note that this chart does _not_ tell you the voltage loss that you are going
to encounter along the length of the trace. It only tells you how much the
trace will warm up for a given current (or inversely, how much current it
can handle for a given warmup).

Bob Ammerman
RAm Systems

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