Users can turn off their own water and electricity. If there is no one at home for a long period of time, the running water and electricity will need to be turned off. If there is no one at home and the tap water is left on, this can cause various hidden dangers and accidents. Users can simply turn off the main water tap in the house and there will be no wastage of tap water.
The electricity in the house should always be turned off when no one is there. If the electricity is always on, there is a risk of fire, so when there is no one there, the electricity supply is usually cut off. Each household has a switch box and users can turn off the main switch themselves.
Research History
Long before there was a specific understanding of electricity, people knew that electric fish powere able to deliver electric shocks. Ancient Egyptian books written 4,750 years ago describe these fish as the thunder bringers of the Nile, the protectors of all other fish. About 2,500 years later, Greeks, Romans, Arab naturalists, and Arab medical scholars reappeared with records of electric fish.
The ancient Roman physician Scribonius Largus also suggested in his masterpiece Compositiones Medicae that patients suffering from illnesses such as gout or headaches should touch electric rays. Maybe the powerful electric shock will cure their illnesses. The ancient Arabs were probably the first to understand the nature of lightning. As early as the 15th century, the Arabs created the Arabic word raad for lightning and used this word to refer to electric rays.