Normal
To comply with current regs it should be a "Type A" RCD rather than the "AC" item already in the CU..Why didn't the original electrician doing the physical wiring alterations to the lights, notice this before commencing the work?(As these are basic checks that should be done before undertaking any alterations temporary or permanent.)Its not wise to have too many circuits all sharing the same RCD..To minimise problems in the event of RCD tripping the recommendations are for individual RCBO'd for all circuits.
To comply with current regs it should be a "Type A" RCD rather than the "AC" item already in the CU..
Why didn't the original electrician doing the physical wiring alterations to the lights, notice this before commencing the work?
(As these are basic checks that should be done before undertaking any alterations temporary or permanent.)
Its not wise to have too many circuits all sharing the same RCD..
To minimise problems in the event of RCD tripping the recommendations are for individual RCBO'd for all circuits.