I have a suspicion that the kind of surge protector rating it’s reasonable to fit to the main electrical input for a building is unlikely to actually trigger on the small surges that the surge protector in a UPS will, and you will still get earth-leakage trips on the RCDs with UPSs downstream of them.
Having one radial (for the computer rack) NOT protected by an RCD seems like a cheaper and more reliable solution, but I confess it’s not bubbled to the top of my to-do list yet to get a sparky involved for advice.
I have a suspicion that the kind of surge protector rating it’s reasonable to fit to the main electrical input for a building is unlikely to actually trigger on the small surges that the surge protector in a UPS will, and you will still get earth-leakage trips on the RCDs with UPSs downstream of them.
Having one radial (for the computer rack) NOT protected by an RCD seems like a cheaper and more reliable solution, but I confess it’s not bubbled to the top of my to-do list yet to get a sparky involved for advice.