rccb and mcb

[stavrosano]

hi all..
i would like to ask a question regarding rccb..
In cyprus we use TT system and i would like to ask about the connection of rccb and mcb as a consumer unit.
Is it ok if i use rccb and mcb instead of mcb and rccb in the connection order.
to be more specific..the main supply goes to rccb and then from the mcb i supply my main db in the house.
The two of them are connected with a busbar on the below side.
Or to i have to put the main supply to mcb and then from rccb to supply the house?
Hope i was clear enough
Thanks in advance

 

[somersetsparks]

I would go RCCB and then MCB as you have.

 

[stavrosano]

But the EAC(electrical Aythority of Cyprus) didnt not approved it:S and the explanation was that mcb must lead rccb in order to fully isolated the installation..the psc was 1200A and the rccb had Ics of the rccb was 1000A

 

[Geoffsd]

Changing the order wouldn't really cure anything, would it? - same problem.

You could get an RCCB with a higher capacity.

 

[Sav]

Hi,
Is the consumer unit plastic or metal?

Eime Kypreos kai ego ( I'm Greek as well ).

Sav

 

[stavrosano]

the consumer unit was plastic and thansk for your replies

 

[Sav]

Hi,

Could you not put a 60947-3 main switch, then RCD ?

Sav