INSTRUMENTS AND CONTROLS 3.3.4 ELECTRICAL ACCESSORIES 1 - OVERHEAD LAMP The overhead lamp is used to check the instruments and the in- side of the cab when visibility is scarce. 2 - ELECTRIC OUTLET The electric outlet is a 12V outlet in compliance with the ISO 4165-1979 standard. It is used for the connection of the revolv- ing light and of the inspection lamp when maintenance opera- tions are to be carried out and visibility is scarce and for the connection of the emergency light. The outlet is powered with the revolving light switch. (See “3.3.2 pos. 13”). 72