2.1. History of the electrical installation

The emergence of the electrical installation was not in fact so long ago. It was only in 1879 that Alva Edison developed an improved version of the incandescent lamp invented by Joseph Swan. As of that moment the gaslights, oil lamps and candles were gradually replaced by the new electrical light source. Power sockets in the home only became commonplace as of around 1920. The Singer electric sewing machines then came into the home, and the electrical installation for the home was born. It did not amount to very much. A light and a switch were placed in every room. A power socket was put in certain rooms.