Can I connect the BG consumer unit that is fitted with MCBs to the house's C.U. that only has RCBOs using a spare RCBO? are there any issues?
If I was top swap the BG MCBs for RCBOs, then is there any issue of "RCBOs effectively being in series"?
Hi Billinski,
Running MCBs from an RCBO, as long as there isn't any overload, is much the same as running them from an RCD (just with a potentially far lower total power capacity).
Running RCBOs from another RCBO, however, would likely lead to nuisance tripping at the up-stream device, as their trip levels will be the same (30mA).
Answered by: Luceco Technical Team
Date published: 2022-07-09