Thanks again.The existing feed to garage is from a 32A breaker on my consumer unit using 4 mm Armoured cable. There is then a 2 way CU with a 30A and 5A in garage from which is run 1 single and 1 double socket and 3 lights. It is my intention to then continue this run to shed using 4mm armoured as already used and fit 2 double sockets and tap off for 2 strip lights. The reason that I asked how to derive amperage is because the existing setup has my kitchen on a 32A breaker running cooker, dishwasher , microwave and kettle, all of which, using the formula stated amount to 24.6A drawn. Then a large fridge freezer which I don't know the rating of. I guess about 2000 Watts?. That being the case it exceeds 32A. On top of that the electrician who did work for me a few years ago has 'doubled up' and put the garage supply onto the same breaker and as I already said there is a washer and a drier in there which I guess draw 12A minimum each, although we don't run both at same time. The potential is therefore there to draw 60A. Am I paranoid or am I correct? If correct I will split the two off because there is spare capacity in the CU. I know I'm going on somewhat but I of course want to get safety first. Thanks so very much yet again and I promise you will soon be rid of me.