Creato: Lunedì, 12 Novembre 2012 14:41
Ultima modifica: Martedì, 22 Ottobre 2019 12:04
Pubblicato: Lunedì, 12 Novembre 2012 14:41
Diagramma di flusso / IT




Fire hazard is the potential for harm to life or property arising from fires initiated by, or associated with electrotechnical products.

This following flowcharts give an important tool for the ones that want to assess fire hazards in electrotechnical products or materials, components or end product, and than to develop fire hazard testing directly link to damages to people and property.

These guided flowchart are addressed to be used by product technical committees for their safety publications. They include also some warnings with the aim to give broad hints from fire experts to the reader.

The risk of fire needs to be considered in any electrical circuit. With regard to this risk, the objective of component circuit and equipment design and the choice of material are to reduce the likelihood of fire even in the event of foreseeable abnormal use, malfunction or failure.

The primary aim is to prevent ignition due to electrically energized part but, if ignition and fire do occur to control the fire preferably within the bounds of the enclosure of electrotechnical product.

It is a must to consider that the fire hazard of an electrotechnical product depends on its characteristics, service conditions and the environment in which it is used.

The basic steps to follow in developing a fire hazard assessment are the following:

  1. The definition of the scope (e.g. the electrotechnical product range concerned) and the context (e.g. where and how the products are used: continuous or intermittent & attended or un-attended service);
  2. Identification of the scenarios of concern (e.g. product engagement in fires, its fire behaviour etc.);
  3. The selection of the criteria to be used, e.g. direct live or properties loss, indirect or comparative methods;
  4. The interpretation of results, e.g. one should specify the procedure to be used in calculating an overall fire hazard comparison between products, or, if more than one scenario has been used, to specify the procedure to be used in calculating an overall fire hazard; moreover if the hazard is not expressed directly in terms of death, injuries or monetary loss, guidance on the other quantitative units and measurements should be provided.


Flowchart 1
Flowchart A1
Flowchart B1
Flowchart C1
Flowchart D1