What to Know About Emergency Drivers for Exit Signs

What to Know About Emergency Drivers for Exit Signs

Exit signs do more than just comply with building codes; they can save lives during a fire or evacuation.emergency driver for exit signs That's why it's important to understand the technical details behind these safety devices. From styles and features to batteries and installation, a thorough understanding of the basics can empower you to make smart choices for your building's safety infrastructure.

Exit Signs: What to Know

Most exit signs include battery backup that activates during power failures, allowing occupants to safely navigate the building to safety.emergency driver for exit signs Many models also feature built-in emergency lighting that activates when the sign's backup system engages. These light systems are designed to last at least 90 minutes, helping facilities meet the minimum illumination standards established by NFPA.

In most jurisdictions, building owners must install easy-to-see red or green illuminated exit signs at nearly every entryway and along evacuation routes.emergency driver for exit signs These lights must stay on for a minimum of 90 minutes during a power failure, and they must be visible from occupied areas within a specific distance.

LEDs have become a popular option for exit signs because they consume less energy than traditional bulbs and produce a bright, easily-visible glow in an emergency.emergency driver for exit signs However, not all LED exit signs are the same. Different types use various internal components that affect visibility and durability, so you'll need to choose carefully based on your building's safety needs and regulations.

Whether you choose a battery-backed or LED model, all exit signs require a reliable emergency driver to manage the internal backup power system. This component draws direct current (DC) from the backup battery to illuminate the sign during a power outage. Emergency drivers typically control the flow of electricity to prevent overcharging and maintain a constant trickle charge to keep the battery charged at all times.

Battery-backed models rely on either sealed lead-acid or nickel-cadmium batteries to provide backup illumination. The former uses lead, lead oxide, and sulfuric acid to create an electrical charge, while the latter uses positively-charged nickel oxide and a negatively-charged cadmium compound along with a dilute solution of potassium hydroxide.

Many lighted exit signs require monthly tests to verify their emergency function and annual inspections for the battery backup system. These tests and inspections ensure that the emergency battery is ready to engage when needed, and they also help prevent fire hazards caused by a faulty system.

While it's possible to install a battery-powered or electric-only exit sign, it's always best to have professional electricians wire a hardwired lighted sign. Improper wiring can result in non-compliance and put occupants' safety at risk.

The type of battery used by an exit sign impacts the amount of current that it can draw, and some models require a specific voltage to work properly. Typically, the sign should be labeled to indicate whether it requires 120V or 277V. While many models are dual-voltage, it's important to confirm the input lead (often black for 120V and orange for 277V) lands on the correct circuit, and to cap the unused leads to avoid confusion.

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