Hi doing an extension and I am trying to find the best way to wire this. The old consumer unit is not up to 17th and I am not sure has seperate earthing to gas and water so to try and get around this I was thinking of taking a newset of tails into a 60a incomer rcd proteted and then run a 16mm t+e to a sub-main.
My two questions are will this get over the earthing if not in place (will try and get to earthing correctly at some point) as the primary characteristics will be the 60a incomer? The new sub-main is near the services easy to earth
Will I need to get a time delayed rcd so not to upset the new sub-main consumer unit taking out the incomer rcd and can you get 30ma time delayed rcd if needed
Thank you for your help
My two questions are will this get over the earthing if not in place (will try and get to earthing correctly at some point) as the primary characteristics will be the 60a incomer? The new sub-main is near the services easy to earth
Will I need to get a time delayed rcd so not to upset the new sub-main consumer unit taking out the incomer rcd and can you get 30ma time delayed rcd if needed
Thank you for your help