Sub Main MCB supply cable

[davesparks]

I have found that the inverter is capable of tripping a maximum of 16A B type MCB under overload conditions, anything of a higher rating requires an rcd for fault protection.

How quickly does it trip it and at what current? Just saying it can trip an mcb under overload could be very different to fault conditions.

An RCD will not work without one pile of the supply being referenced to earth, otherwise you have two floating poles with no earth reference and nothing for the RCD to work from

 

[Pmarsh]

How quickly does it trip it and at what current? Just saying it can trip an mcb under overload could be very different to fault conditions.

An RCD will not work without one pile of the supply being referenced to earth, otherwise you have two floating poles with no earth reference and nothing for the RCD to work from

It trips in the desired times now that it is connected to the rcd side of the installation and the installation is referenced to earth through a rod (TT) the manual for the solar installation requires that it be installed with a TT earthing arrangement.

The equipment is supplied by SMA if you'd like to take look in to it.