On Nov 3, 5:27 pm, Tehrasha Darkon wrote:

Hooking them up backwards is most likely a very bad idea, as most oven
transformers have one side of their secondary tied to the core. Never a
good idea to hook up mains to such a design, due to risk of electrical
shock.

Good point: I had forgotten that.
I recall the few cases I've worked on them, one end of the HV
secondary IS connected to the frame and thereby to the chassis/metal
box of the microwave! Detaching it might be dicey if insufficient
insulation from what would then become the neutral of a 115 volt
input. BUT if used, in North America on 230 volts would be (one side)
or 115 volts RMS above neutral and ground!!!!!!
Thanks for the heads up on that. Terry.