Yes, that is a FCU, but we need to know if it is live.
If it is live we need to know what circuit it is connected to, and the size of the MCB.
If not live we need to know where the other end of the cable goes to.
Do you have a test meter?
If it is live we need to know what circuit it is connected to, and the size of the MCB.
If not live we need to know where the other end of the cable goes to.
Do you have a test meter?