gee thats technical,when say a machine which runs on 3 phase runs thw WRONG way,swap a phase around our colours are grey brown blue L1 L2 L3,so you would put L2 onto L1,and L1 onto L2,its just the way the machine has been manufactured,we get a lot of Italian industrial machines like that follow there diagrams turn em on n grind to a halt smoke coming from motor,simply swap a phase over
