There are different types of emergency lights that you may find in buildings, such as exit signs, exit lights, and emergency lighting fixtures. Despite their differences, these emergency lights are commonly powered by batteries and are connected in a way that ensures their reliable operation during power outages or emergencies.
Emergency lights are typically wired in parallel, which means that each light is connected directly to the power source through an individual wire. This wiring configuration ensures that if one light fails, the others will still remain operational. The wire used to connect the emergency lights should be of sufficient size and must meet the building codes requirements.
In addition to the wiring, emergency lights are often equipped with a central control unit. This device enables the facility manager to test the lights, monitor their battery levels, and respond to system faults. The central control unit may be a standalone device or integrated into the building management system (BMS).
During normal operation, emergency lights remain turned off unless there is a power outage or emergency. In such situations, the emergency lighting system automatically switches on, providing illumination for occupants to navigate their way to the exit pathways. Exit signs, for instance, often use bright, red letters that are easily visible even in smoke or dimly lit areas.
It is crucial to maintain emergency lighting systems in commercial or residential properties. This involves regular inspections and testing of the lights and backup batteries. The facility manager should ensure that the batteries are fully charged and conduct a monthly test to ensure the lights come on during an emergency. Additionally, these systems should be subjected to a yearly four-hour battery test. Any malfunctioning components should be repaired or replaced promptly.
In summary, emergency lights are connected in parallel for reliable operation, and a central control unit may be used to monitor and control the system. Regular inspections and testing are crucial to ensuring that the emergency lighting system remains operational during an emergency. Therefore, this type of lighting plays an essential role in any building's safety infrastructure and must be installed and maintained according to the building codes and regulations.
