BS EN 60079-6 AMD1. Explosive atmospheres. Part 6. Equipment protection by liquid immersion "o". Part 6: Equipment protection by liquid immersion "o"|Performance, Type o protected electrical equipment, Type testing, Insulating oils, Protected electrical equipment, Quality control, Liquid electrical insulating materials, Pressure regulators, Risk assessment, Oil-filled electrical equipment, Pressure testing, Explosive atmospheres, Mineral oils, Electrical safety, Liquid-level indicators, Electrical equipment, Temperature