While RCDs are required for all final sub circuits in domestic and residential installations, this is not the case for non-domestic and non-residential installations. In non-domestic and non-residential installations (refer to clause 18.104.22.168.3.3 of AS/NZS 3000) the requirement for RCD protection applies to all circuits and final sub circuits with a rating not exceeding 32 amps, supplying:
Factors that may represent an increased risk of electric shock include:
An example of this may be equipment installed in or near a wash down bay.
Therefore direct connected equipment, such as air-conditioners that are installed in commercial premises and are not in an environment that is likely to increase the risk of electric shock, do not have to be RCD protected.