Led Lamp still dim when 2 way + intermediate switches are off

sparkzalot · Oct 29, 2015

Landing light is not fully switching off when operating the 3 switches on the landing/hallway.
A small voltage (less than 40v) is present between the switched live and neutral.
After trying a new lamp it worked fine.
Any ideas anyone??

bigspark17 · Oct 29, 2015

Small voltage running down 2way. Check ur switches!

Richard Burns · Oct 29, 2015

Adjacent cables can impose a small voltage on un powered cables, such as the three core cable in multi way switching.
Because LED lights need very little power to operate and having a capacitor on the input they can be charged sufficiently to glow or pulse even though the switches are off.

sparkzalot · Oct 29, 2015

Richard Burns said:
Adjacent cables can impose a small voltage on un powered cables, such as the three core cable in multi way switching.
Because LED lights need very little power to operate and having a capacitor on the input they can be charged sufficiently to glow or pulse even though the switches are off.

Thanks very much. Very helpfull. Inductance has popped into my head. All makes sense now