Multimeter Melting Light Switch
Im posting this for my son who is wondering what he did wrong. He was replacing a light fixture and wanted to test for power at the switch. He set his multimeter to VAC200 and put one probe to the top screw and the other to the bottom of a single pole switch. The hot screw popped/sparked violently and melted the probe a bit and a portion of the switch. The breaker never tripped.
This is the second time he experienced this with his multimeter (last time somewhere else).
He is wondering a few things:
1. Why didnt the breaker trip?
2. He replaced the light switch and cleaned the black off the copper connection. Is there any risk with the wiring inthe box? Everything appears to work as it should with new switch.
and in general 3. What is he doing wrong?
To quote him "Im freaked out to use my multimeter now!".