I did read several questions about safely probing high AC voltages with an oscilloscope. I had been taught to isolate the scope, which I see now is dangerous. So I think what I should do is then use an isolation transformer between the DUT and the 120VAC wall outlet. My question is then if I want to measure say just the AC voltage waveform can I just connect my ground clip to the isolated neutral and my probe tip to the isolated line? Assuming both probe and scope input can take the voltage?
Or do I need another transformer between isolated neutral and line and the scope?