Not touched a nerve . Just making sure an unsuspecting client isn't badly advised by a plumber, regarding electrical regulations.
It's that simple.
Thanks to the forum I now know is not an 'electrical' requirement, is the dedicated circuit preferred by plumbing professional trade bodies as best practice
BS7671 314.1 Every installation shall be divided into circuits, as necessary, to:Vee- you can disagree with me you like, but please offer up a BS 7671 reg number to back up your position
(i) avoid danger and minimise inconvenience in the event of a fault
(ii) facilitate safe inspection, testing and maintenance.
& (iv) reduce the possibility of unwanted tripping of RCD's due to excessive protective conductor (PE) currents not due to a fault
BS7671 314.2 Separate circuits shall be provided for parts of the installation which need to be separately controlled, in such way that those circuits are not affected by the failure of other circuits, and due account shall be taken of the consequences of the operation of any single protective device.
Interpretation of Best Practice within this is of course in the eye of the electrician.