How to install your smoke detector properly. Detectors that are hard-wired into the home electrical system should be installed by a qualified electrician. If the detector plugs into a wall socket, make sure the outlet is not connected to a wall switch that will allow someone to accidently turn off the electricity. Make sure the plug has a restraining device to keep it from being accidentally disconnected.
Many detectors are battery powered and can be installed by the homeowner.
Read the directions that come with the detector for proper placement or call your local fire and rescue station for advice. For minimum protection, smoke detectors must be placed near bedrooms and in all basements, either in the middle of the ceiling or six to twelve inches below the ceiling on the wall. This placement enables the detector to sense the smoke as it approaches the sleeping area. Smoke, heated air and toxic gases will rise to the ceiling and begin to mushroom down. Additionally, it is recommended that there be at least one smoke detector on every level of the home.