Isolation for fire fighting

Fires are expensive and seriously affect electric service. Unfortunately, so long as oil and combustibles are used for insulation and so long as electrical energy behaves as it does there will always be fire hazards to trouble the industry. Progress in eliminating these hazards has, however, been made in the last few years. The principle of isolation has been used to good advantage in many parts of typical systems. In recent hydroelectric stations, all apparatus containing oil has been placed outside the station structure. In metropolitan substations oil-filled equipment has been placed in fireproof compartments. Care in installation, precaution in handling oil and better inspection and maintenance of the oil have reduced the danger.