I know it is not clear cut. But where say a pub has live in accommodation and if they share the same metered supply, any notifiable works are subject to the dreaded part p**.
BS7671 has a series of regs ........201, sometimes, especially applying to "domestic" premises; like 421.1.201 .To my mind a pub a described above is commercial, but of course works on the wiring is subject to the P.
But if you have one DB in the clearly commercial part, supplying all final circuits in the building, I do not see some ......201's applying to say a replacement DB if it is not actually in the what P describes as a domestic dwelling. I except there is still notification requirement, as I have always understood it.
