I'm thinking not, but I could be wrong. The
reason I'm thinking 'not' is because the X-
10 signal will meet the primary coil in the
transformer and will not be transferred to
the switching device.
What kind of transformer are we talking
about, though? Are you going to get an
industrial-strength tranformer to drop the
the voltage for the whole house? Will your
local codes, there, allow for that?
Here is a link to a website from a guy in
the Netherlands, I think, and he has info on
what you're trying to do. I cannot vouch for
the dependability of this info. He gives a
link to either another page, or another site
that has all the info you may need. Here's
the link:
http://www.geocities.com/ohomer/ I hope this is of help.