It is possible that where a clamp goes around a bundle of wires one is running the opposite direction to give a negative value. There is no real way to determine when this might be the case.
Multiple phases in one house could also cause issues if they were put through the same clamp. The contracted installers should have been aware of this but...
(h/t Jefferson)
It is possible that where a clamp goes around a bundle of wires one is running the opposite direction to give a negative value. There is no real way to determine when this might be the case.
Multiple phases in one house could also cause issues if they were put through the same clamp. The contracted installers should have been aware of this but...
(h/t Jefferson)