I'd be grateful for your opinion of this RCD wiring setup in the house I've just moved into. The RCD is for a shower (a power shower, not one that heats the water itself). At the top of the RCD, the live and neutral are attached and run to the shower. At the bottom, the live and neutral come out, and run to the CU. My question is about the earth wires. There are no earth sockets on the RCD so the earths from the top and bottom cables are just connected together via a block. Does that sound right? It all looks neatly done, and the test button works, but I'd just like to double check that this is correct since it involves water and electricity. Any advice greatly appreciated.