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Causes of fire

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The main causes of fire are

  • open flames
  • hot surfaces
  • electrical overheating
  • electrical arcing and sparking
  • sparks from tools
  • friction
  • spontaneous heating (for example mixing the wrong chemicals
    together)
  • sparks from welding and cutting
  • carelessly discarded smoking materials or matches
  • static electricity and explosions

Extinguishing agents and classification of fires
Before a fire can occur three things are necessary: fuel, heat and oxygen.

These three factors are often referred to as the triangle of combustion. If you remove one factor, the triangle collapses and there can be no fire.

Fires are classified into five categories according to the fuel type and the means of extinguishing.