Around 30 years ago the upstairs attic was converted into a bedroom. I am now in the process of doing redecorating (painting, replacing the electrical outlets and covers. etc.) I have completed a lot of electrical work in the past but I did not wire the upstairs sub panel. The other day I replaced the first electrical outlet upstairs. I was always taught white goes to silver, and black goes to brass, but I noticed that it was wired white to brass, and black to silver. I also noticed that it was physically installed upside down. I never really thought about it before because my electrical tester (when plugged into the outlet) showed that they were wired correctly.
So here’s my question, should I go through the trouble of rewiring the entire sub panel, or should I wire the rest of the outlets backwards - keeping in mind that the electrical tester shows the wiring is correct? If this was DC the answer would be obvious, but I’m not so sure it really matters in the end with it being AC. I’ve wired panels before so that’s not a problem, I just don’t want to do more work than necessary, considering I’m going to be replacing all the outlets anyways. My gut tells me to reverse the wiring from the main panel to the sub panel, but how necessary is this?
Also, with my upstairs wiring being backwards, isn’t that somehow affecting my downstairs wiring since it’s connected to it?