Q about Fitting 3KW Heater to a 15A radial on Wylex CU

[333rocky333]

The repair guy who came out to the aforementioned dishwasher told me he had seen several qualified electricians get the blue/black change wrong. I guess all we need to do now is rename the Blue Phase to Black and then we're sorted

Is not the blue phase now L3 grey

Brown is L1 previously red
Black is L2 previously yellow
Grey is L3 previously blue

Exception being cable with 1 brown and 2 blacks etc

 

[JonoPashley]

3kw heater on a 230V supply draws 13A on its own. leaving you 2A for the other sockets. not a great deal is it. coupled with the fusing factor of re-wireable fuses i would have an item like this installed on its own A3 radial circuit by a qualified registered electrician.