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Many thanks for the sound advice, will upgrade to 80/30ma RCCB when shower installation is complete, yes you are correct it is the current model, crabtree starbreaker. Sorry to be a pain, any comments on meter current limitations and total cu load,(applied diversity considered) ie; service...

Hi JohnD, My mistake for referencing to the main meter as sub...just been onto eastern electricity who have arranged to install an updated meter early march FOC.. Presumably they will install a higher rated meter, which brings me back to my original query how the meter rating is calculated...

Just legged it out under the stairs and looked, still has the eastern electricity board label saying it was replaced june 85..... wondering why the registered sparky did'nt flag that up..? who's cost ?

Hi Guys, taken your advice ref photobucket , have posted pic of the the setup via following link.... http://i179.photobucket.com/albums/w309/mossiejdm/Dscn2045.jpg

Hi Crafty, second time posting, have uploaded pic of setup i was referring to but not sure when Diynot.com will upload, soon hopefully. As you correctly stated, from the main service supply cable is the service fuse, (presumably 60-80A?) then looped to the 40A rated sub meter, then looped to...

Hi, I have just had a new Crabtree consumer unit professionally installed, 100a main switch, split load 63/30ma RCCB protecting all supplies except lighting. (House built 1960\\\'s) My query is although the supplier protection fuse is rated at 100A,and fitted between the meter and CU, the...