Is this a double width device? If so you will need a big DB!
They are usually a single width device. (And usually more expensive than the combination of an RCD + breaker.)
Sounds like the rich world overkill syndrome… 
Is this a double width device? If so you will need a big DB!
They are usually a single width device. (And usually more expensive than the combination of an RCD + breaker.)
Sounds like the rich world overkill syndrome…