- Jan 1, 1970
Good luck getting that through UL.
Where did the o.p. state that he wanted to bring the design through UL?
I've brought a bunch of products through UL (and CSA and TUV) and have
the gray hair to prove it.
The o.p. is trying to monitor three different 120V signals. I don't
think he wants to use the Tektronix method, however clever.