Eeyore wrote:

"Ron(UK)" wrote:

If the neutral wire isn't properly grounded enough voltage can be
induced by or leak from other 'live' circuits, maybe enough to cause the
fluorescent fittings to randomly flicker.

Ron, when the switch is off, there is no circuit. The neutral potential
literally doesn't matter.

Graham


It`s a two way switch, there`s plenty of potential for leakage paths.
You can easily get 100v on the neutral if it`s floating above earth
potential.

Ron(UK)