Its probebly appropriate to mention that anyone wishing to do this would be
advised to recover the oil from old transformers or other components.
The PCB content might make the stuff deadly rather than inert.
I'm not quite sure which properties of transformer oil lead you
to characterise it as "inert"?
One of its most troublesome characteristics, in its normal use,
is that it is hygroscopic. That is, it absorbs moisture from the
atmosphere. That is why transformers have to be sealed, and the
air space, to allow for expansion, connected to atmosphere via a
silica gel breather.
Chris J Dixon Nottingham UK
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