PIR Sensor help

[Cpd]

Ok so I want to wire in this sensor but I am struggling to understand the wiring diagram I have wired in lots of switches before and you just have a switched live. Can someone explain what ‘A’ is and how this interacts with the Neutral….. I thought the neutral should not be interrupted….. the lamp should be on a live line. Thanks…..

[TonyT]

The A is the switched live/line going to the light fitting.

 

 

[Cpd]

thanks @TonyTworking now, I just did not understand the diagram but understood the principle……. Did not want to do it wrong