I am replacing a garage door opener that is hardwired. I have disconnected everything and inside I have three wires black, white, and red. My original plan was to wire up an outlet. In the past when I have wired an outlet
I have always had a ground wire. I did some research and it appears that you do not need a ground wire if you are in metal conduit. Is that correct?
I was able to use an electrical ground tester on the box I put in and everything worked.
I am now doing the second garage door and it also has a red wire. The red wire on the first opener was screwed into a connector in the opener. In the second opener it was just screwed into the inside of the box, not connected to anything.