On Dec 5, 10:51*am, "N_Cook" wrote:
I hadn't thought about the wiring being hotter than the platteau temperature
, but of course there must be a temperature gradient between the heat source
and the periphery.

In the old lamination type power transformers I used to find that half
the power went into the core and half went into the copper, with half
[one fourth of total power] of that into primary and the other half
into the secondary.