Originally Posted by Trick440
To clarify when I tested any 2 legs gave me 240v. When I tested the legs to ground, 2 read 120v and the high leg read 210v+ (I'm not sure the actual number for this high leg I seen it around 208v it stuck in my head its a 208)



240V 3Ø has 2-phases 120V L-N, & what is supposed to be the B phase 208V L-N, any phase to phase should be 240V, 208Y/120V has
L-N of 120V, L-L is 208V just a note, a "slash rated" 120/240V breaker cannot be used between the high leg and any other phase, expensive 240V rated breakers have to be used.