Is an RCD required with RCBO's protecting the circuits

[Rooster]

Surely if you fit an RCBO on each circuit, an RCD is not required?
Of course, a DP Main switch would be to cut all power, but like I ask, is the RCD required as it is incorporated in the RCBO?
Thanks

 

[DPG]

Surely if you fit an RCBO on each circuit, an RCD is not required?
Of course, a DP Main switch would be to cut all power, but like I ask, is the RCD required as it is incorporated in the RCBO?
Thanks

The RCD function is included in an RCBO yes. There may be occasions when a different variant of RCD may be required though (100mA / time delayed etc.)

 

[Mike Johnson]

To answer the title of your thread NO.

To answer the first line of your post correct, but see DPG's post above.

 

[littlespark]

Not required… as long as assuming the RCD is “in series” with the RCBO…

Does happen. And the only issue is, which 30mA device will trip first?

I think your other thread mentions caravans… which is one example.
There will be an RCD or RCBO in the hook up, but also one in the caravan consumer unit itself.