In the event of an emergency and if a major power failure has occurred, most occupants within a building do not realise that even during the day, a building can be extremely dark making the exits difficult to locate. To overcome this life threatening problem exit signs and emergency lighting are installed throughout a building showing the occupants the fastest way to evacuate.
Exit signs and emergency lighting are fed via 240volt power similar to ordinary light fixtures. Unlike ordinary light fixtures, exit signage and emergency lighting have an internal battery allowing illumination even when main power is out.
Under the Australian Standards AS2293 exit signage and emergency lighting must stay illuminated for a minimum of 90 minutes. The Australian Standards and local council requirements also state that exit signage and emergency lighting must be tested and discharged at the following intervals:
6 Monthly: Technician must conduct a 90 minute power drop test
Annual: Technician must conduct a 90 minute power drop test
By conducting the required testing not only do you meet your duty of care, but also by discharging the batteries every six months you will prolong the life of the exit sign or emergency light.
There are three different types of emergency lighting: