@LP2Lily
Still, 120 on a non-gfci circuit is dangerous.

Re main calm not 240
:P

This gives me anxiety, probing across 240 or 120 mains.

Cute sketch! I love it.

I work with circuit boards and things myself. More self taught then anything. I hope to create an open source embedded type thing. I wanted to do PLC’s in industrial, but covid was the final nail in the coffin. My teacher hated how I organized my NEC math and hated my sketch noting. I could not learn and dropped out not long before covid lockdown.