There is evidence that the type, positioning and inter-connectedness of smoke alarms are crucial to its effectiveness of alerting people to the presence of a fire.
Recently, there were two major changes that form the basis of this new legislation, aimed at protecting the lives of every resident, by creating safer homes and one unified smoke alarm system. This ensures that your smoke alarm system will be more reactive to the presence of a fire in your home. The new laws impact all newly built homes and rentals, plus any home undertaking substantial renovations.
From 1 January 2017 smoke alarms installed in new homes must be:
• Photoelectric type only;
• Hard wired to the electricity supply;
• Interconnected to every other smoke alarm;
• Installed in each bedroom;
• Installed in hallways serving bedrooms; and
• Installed in the exit path of every storey not containing bedrooms.
Source: Master Electricians