Whoa! DON"T PANIC !!

Microwave oven transformers are kind of neat things. The primary and
secondary are loosely coupled because they are not wound one on top of
the other. That makes it easy to take off just the high voltage
secondary.( the one with many turns of fine wire ). Once you do that
most of the danger is gone.
Not that 115 volt house power is danger free, but it is not the same as
about 1200 volts at close to an amp. While you are at it take off that
filament winding.

Now you can wind a few turns of heavy wire and have a source of low
voltage.


Dan