Voltage detectors are tools that can be used to detect the presence of an AC voltage without having to touch the wire or conductor that is carrying the voltage. To learn more about the working principle of a non-contact voltage detector read this article. The idea here is to have a similar setup where the capacitor plates will be replaced by conductive paint.
The insulating element will be made of paint materials that have good insulating properties. The building's paint will constitute a network of non-contact voltage detectors. The detectors will go off around places where a voltage is detected and there should not be an electric voltage. The system of detectors can be set to alert the people around such regions with both audible and visual signals. That way the chances of people getting accidentally electrocuted will be reduced. This type of voltage detector paint system should be used extensively in industrial buildings and construction sites. Its use in residential areas should also be emphasized as the number of accidental electrocution cases that happen in households is quite significant.