Hi there, I'm an apprentice electrician and looking for some help/advice. I want to rewire my parents house. 3 bedrooms, 2 living rooms, 1 kitchen, 1 utility and 1 bathroom. Approx 2 double sockets in each room except bathroom obviously and a few extra in kitchen and utility. Standard pendant light in each room. No electric shower. Has immersion and electric oven. I can wire sockets, lights etc and consumer unit but my question is how to select RCD size. I purchased a consumer unit fully populated. 100a main switch and dual RCD, both 80a and multiple mcbs. I'm in Ireland and have only seen 63a or lower in domestic. Is 80a to large. I work for a large electrical company with multiple people so advice is hard got because you never work with anyone interested. Just a lot of fed up electricians. Help would be much appreciated.