I have 6mm wire feeding a electrical cooker and a single socket. the wire runs from the consumer unit to the kitchen. the electrical cooker is not longer need (it has been replaced with gas cooker). I would like to use the 6 mm to feed 2 double sockets in the kitchen. it is currently connected to 32A mcb. I would like to replace the 32A mcb with rcbo for safety. shall I use 16A rcbo or 20A or 32A?