Hello, Please could one of you kind Pro's help me out of my confusion - i am trying to understand the protection needed for a 10.5kW shower (NO, i will not be doing any wiring, but i'm just trying to understand the jargon!) My questions/confusions are: Would an RCBO offer better protection than an RCD? Would you put the RCBO on the RCD side of a split CU? WHy? Do RCBO's come as 2 pole, or are they only concerned with the phase wire? (Please can someone explain this a bit? I thought it's be better to cut off live and neutral in the event of a fault?). If they are available, who makes them? For a 10.5kW shower, 10mm cable, would 50A RCBO in the 63A RCD side of the split CU make sense (i know it doesn't leave much room for other things on the RCD side of the CU). I'm just trying to understand, but my brain is running down the side of my head! Thankyou for any help, Stu.