Why does the power strip's switch light turn on even when the switch is off when I plug in a Schuko plug (CEE 7/7)?
Your washing machine probably has a ground fault.







simulate this circuit &ndash; Schematic created using CircuitLab

Based on reversing the plugs you can get these two situations:
- Top schematic: ideal situation, switched live.
- Bottom schematic: switched neutral. Ground fault in washing machine still lights up the indicator.

An RCD will probably trip when you close the switch. If the fault current is high enough.

Sidenote: washers and dryers are not supposed to go into powerbars. This is a fire hazard.