Common Receptacle Types

As we are often admonished on this board, you needn’t post the same information twice!

Your 120v outlets are labeled x and y when they should always be x and w (120v uses a neutral or grounded conductor).

I agree.

According to the labels, the 15 and 20amp 120V receps are getting 240V and the 240V 30A recep is getting 120V.

“Positive” implies a DC circuit.(Maybe I inferred that).

I think a more appropriate labeling would be:

N- neutral
A- A phase
B- B phase
C- C phase