adding addition to radial in bedroom (no rcd protection at all)
planning on mounting a seperate rcd next to cu but need to know
20a mcb in cu using 2.5 to 30ma rcd but unsure of the a rating of the rcd does it need to be same or higher than mcb or does it not matter as its earth leak protection im concerned with,
the reason i ask is my local store only has 40a 30ma rcd and up in store, would this be ok?
planning on mounting a seperate rcd next to cu but need to know
20a mcb in cu using 2.5 to 30ma rcd but unsure of the a rating of the rcd does it need to be same or higher than mcb or does it not matter as its earth leak protection im concerned with,
the reason i ask is my local store only has 40a 30ma rcd and up in store, would this be ok?