It is important to have every electrical installation periodically tested both for safety reasons and to ensure conformity with current regulations. Most of the wiring in any house is not visible and even though there may no external signs of a problem below the surface a cable can be gradually be turning into a dangerous hazard. The picture at the side shows what happened in a kitchen when a cooker control unit developed a fault. The owner of the house was in the garden at the time whilst the oven was on cooking the tea.
