What type of RCD is required to be voltage dependent in New Zealand?

The requirement for a Residual Current Device (RCD) to be voltage dependent in New Zealand pertains specifically to Portable Residual Current Devices (PRCD). PRCDs are designed for use at locations where electrical equipment is used and are particularly important for applications where equipment is frequently moved, such as in construction sites or outdoor activities.

Voltage dependency in this context means that the device is designed to trigger an operation based on the voltage levels it measures. This feature not only enhances safety by ensuring that the device is functioning correctly under various voltage conditions but also provides protection against electric shock by disconnecting the supply if a fault is detected.

Other types of RCDs, like Integrated Residual Current Devices (IRCDs) and Fixed Residual Current Devices (FRCDs), serve different roles in electrical installations, either being integrated into circuit breakers or installed as permanent fixtures in electrical systems. While they provide crucial safety functions, they do not typically carry the same mobility or requirement for voltage dependency that is essential for portable applications, which is why the PRCD is the required option for voltage-dependent functionality in New Zealand.