Garage CU and RCD in series

[Fitzy]

How would you record the install? MWC for the main DB to garage DB ( assuming using MCB that is there already and has 6mm cable just re-routing) and EIC for garage DB

House CU to garage is “new circuit” and garage DB is a “new CU”, so both require an EIC to be issued and LBC notified.

 

[Deleted member 26818]

i have a mk sentry metal db dual split rcd and just slid the rcds and mcbs up the din rail to make room for an mcb between the main switch and the first rcd. put a short buzz bar to connect it. View attachment 47518

How does the RCD like sharing the Neutral with the stand alone MCB?