Hi guys, i fitted a replacement CU today on a TT system. I have used a main switch with double pole rcbo's. The pre installed surge device is protected by a 32amp mcb. It basically has a loop of 6mm inside the unit aprox 5 inches long that loops from the breaker, behind the meter tails into the top of the surge device. I was a bit concerned because of the circuit breaker, i was tempted to order another rcbo, but after reading through the manufacturers bumf it says its fine on a breaker or fuse on a TT system. I presume this is because it is part of the assembly ? Or is it because the link is so short and it's pretty much impossible to cause a problem. A bit like meter tails in the metal box if installed correctly. Any thoughts please.
Cheers Gary
