fitting a double oven

When fitting a double oven, Gas Cooker Installers always turn off all power switches that are connected to the double oven they are fitting; as to prevent any accidents occurring to the double oven or double gas oven fitter and to the double oven itself. After this is done, in continuation with fitting a double oven, the face of the cabinet will need to be measured and made sure that it is in correspondence with[...]