RCBO wiring direction?

[farnja]

Hi All -

I have a new-to-me boat and I'm trying to better understand the electrical system. I'm sorry if this is the wrong forum, but it's a French built boat using all Hager MCBs and switches. None of this stuff exists in the U.S., afaik.

I'm not on the boat at the moment to test but from these photos I snapped, it looks like I have an Overcurrent + Differential breaker taking input from the bottom, then it has bus bars on the top to two MCBs, then those output from the bottom. This seems strange to me but wanted to know if 1). Is this the case? and 2). Is this common and is there anything wrong with that?

Attached are photos of the front, then bottom, then top.

Thanks in advance!

 

[littlespark]

Wish we had these in the Uk as well. Dual busbar

It appears to be correct.

The symbol next to the 1 and 3 on the ADC732F on the left show arrows pointing toward each other, which I assume means bi-directional.

 

[farnja]

Thank you!