Lighting and alarm cables running alongside each other

[sparkymarka]

Do you have a multimeter ? If so before you extend the cable …put one probe on 0v in the alarm panel and the other on the earth connection ….set on AC ….what is the voltage ? Make a note , now do the same afterwards ….this will see if induced AC voltage has increased .,,.

 

[Jupiter01]

Do you have a multimeter ? If so before you extend the cable …put one probe on 0v in the alarm panel and the other on the earth connection ….set on AC ….what is the voltage ? Make a note , now do the same afterwards ….this will see if induced AC voltage has increased .,,.

The cables are currently disconnected in the panel. Can I do this test in that state?