When design the electrical installation and electric power for building or factory,the main objective that we need to focus is about emergency and standby electric power systems.The main reason  is the about safety of building occupants following a power outage.

When danger or disaster happened at building or factory such as fire,heavy smoke, chemical hazard,tsunami or earthquake,the emergency procedure backup power system is important and it required for evacuation from the building.

At the very least, emergency and standby power systems should provide lighting to assure the safe evacuation and  panic-free exit of people from the building. read more