Mark Lloyd wrote:
On Tue, 02 Sep 2008 14:06:28 -0500, dpb wrote:

....

Then with stranded there's less copper to make up for the extra air.
Air will be present because of the (space-filling) inefficiency of
ROUND things.

Well, actually, there is a very small difference that does account for
it, but it's not of much importance for any practical purpose...typical
specs for stranded vis a vis solid--except for the last column which I
backed out of the previous three columns of data, these are from the
American Insulated Wire catalog.

(AWG NUMBER PVC NYLON APPROX. APPROX.
OR OF INSUL. JACKET OUTSIDE Conductor
KCMIL) STRANDS THICK. THICK. DIAMETER DIAMETER
(INCHES) (INCHES) (INCHES) (INCHES)
14 Solid .015 .004 .104 .066
12 Solid .015 .004 .121 .083
....
14 19 .015 .004 .112 .074
12 19 .015 .004 .131 .093
....

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