For RCBO, MCB products, this is to try and develop a sensible approach for the marking of 230V on RCBO's to appease NZ. In short, we will be aiming for it to be acceptable to mark '230V' (i.e. no reference to 240V) but testing will still need to cover 230V and 240V. IEC 60889, AS/NZS 3190, AS/NZS 61008.1, AS/NZS 61009.1.
The marking of 230V on RCBO, cover 230V and 240V for AU and NZ market