I'm testing a power supply that is supposed to deliver 5v ac. It is a cord with a household plug on one end and a switch with two leads coming out which will get wired to a little ac motor that it goes with.

Using my Fluke 101 multimeter, I get a reading of 5v with the switch in one position. When the switch is in the other position it reads 120v with a little high voltage indicator on. I sure thought the other position would be OFF.

I think it is supposed to be an on / off switch-- one side of the switch is marked with a -

The back of the switch says 3A / 120vac 125 vl. Also, 303, which I guess is a part number.

Did I get a bad switch? Am I misunderstanding something?

undrdog

The cord & switch are pictured. It came with a little "deer motor" - used to run animated deers that folks put in their yards or for running a rock tumbler.

Here is a link to the set:
https://www.amazon.com/gp/product/B07JQLCMX4/ref=ppx_yo_dt_b_asin_title_o00_s00

cord (resized).JPG

kevmad Now I feel really dumb... why does the multimeter show 5v when the switch is off?