Hey OP,
Those testers are very very simple devices that work well only with "normal" problems.
Chances are it looks for voltage on the neutral, and decides if it is there, that the voltage is inverted.
It doesn't know anything about balanced power. It's just very basic circuitry performing very simple IF...THEN calculations, and that is exaggerating the complexity already. :)
Best,
E
Those testers are very very simple devices that work well only with "normal" problems.
Chances are it looks for voltage on the neutral, and decides if it is there, that the voltage is inverted.
It doesn't know anything about balanced power. It's just very basic circuitry performing very simple IF...THEN calculations, and that is exaggerating the complexity already. :)
Best,
E