Before revision: Contact states upLight switch with a normally open contact pair A normally closed () contact pair is closed (in a conductive state) when it, or the device operating it, is in a deenergized state or relaxed state.
After revision: ==Contact states== upLight switch with a normally open contact pair A normally closed () contact pair is closed (in a conductive state) when it, or the device operating it, is in a deenergized state or relaxed state.