Emergency light fixtures often run on the same line in different areas of a large room but this is not the best option. If there is a problem with that line, none of the emergency lights will work, creating a safety hazard. The mounting arrangement of emergency light fixtures is determined by wiring codes. There are two types of connections for wiring ceiling-mounted emergency light fixtures -- solderless and soldered.
Shut off all electrical power to the room. Use a voltage tester to determine that the power is off. Touch the voltage meter to the circuit breaker wires after shutting the breaker off. If the ohm needle moves, electricity is flowing into the room.
Mount the ceiling outlet box with a strap and attach the strap to the centre stud. Use a locknut to attach the strap to the centre stud.
Fasten the fixture canopy of the emergency light to the strap with two screws.
Twist the hot wires together, black with black, white with white and bare or green to bare or green.
Insert the wires into a cap and twist the cap so the wires screw in securely. The cap insulates the wire from moisture and debris.
Use a noncontact tester to determine which wire is hot coming from the ceiling bracket. If the light on the tester lights up, you have found the hot wire.
Use a noncontact tester by touching it to the coloured hot wire to see if electricity is connected. Do not turn on the emergency light to test, as you could blow out a bulb.