The actual classification used for Italian regulations for the fire behaviour of materials/component is described in the standard UNIFER PrE10.02.977.3 "Guidelines for fire protection of railway, tramway and guided path vehicles - Part 3 Evaluation of fire behaviour of materials - threshold values". Similar to the French Standard, the Italian Standard provides the classification of the material/item by "reaction to fire" and "smoke" (combination of smoke emission and toxicity). Reaction to fire For the parameter "reaction to fire" (FI parameters) are provided six categories:
The "smoke" parameter is obtained identically to the French Standard, namely from combination of "smoke emission" and "toxicity index" (F value). The first one is evaluated by NF X 10-702 (Smoke density Chamber) and the second one with NF X 70-100 (toxicity test). There are three acceptable classes from F1 to F3. For electrical materials smoke emission and smoke toxicity are separately evaluated with NF X 10-702 and IEC EN 50267part 1 and 2. The classification system is done by a "threshold value" for "reaction to fire" and "smoke" for each listed item described in two summary tables in the standard (one for electrical components the second for all other materials/item |