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Consider a scenario with an all-RCBO CU with no incomer, e.g. the main switch external because an enclosure with switch+SPD has been used, and all-RCBO means there's no RCCB. How to connect a L tail to the busbar? In all my years I've never come across a device to do that. I've found this...

Does the team think that as Type B and Type F RCBOs can't be had, that we might see a "return" to RCCB+MCBs? Yes, I know we never "left" that, hence the quotes, but all-RCBO has been the "gold standard" for a while. Now though?