23/2008. B2CA-S1-D1 Class B2CA Class requirements for cables through freely installed and protected escape routes in buildings such as kindergartens, intensive care, ambulances, operating rooms, hospital classes, social institutions, Buildings with capacity (hotels, boarding schools, etc.) in common premises (halls, recipes, dining rooms, menu, restaurants). This class is known as a "class of regulation cables". These are mainly halogen -free, low smoke and fire inhibitory cables.

Parameters of each mark:

- B2ca - a combustion test where the cable is up to 15 mj from 1200 s (20 minutes) up to 15 mj, maximum heat release rate is up to 30 kW, a flame front is up to 1.5 m, the fire spread rate index is not more than 150 W S ​​-1, the flame is up
-S1-The smoke generation rate is less than or equal to 0.25 m² · S-1 and the total amount of smoke generated in 1200 seconds (20 minutes) is smaller than 50 m²,
- D0 - Possible dripping of burning particles is not possible within 1200 seconds (20 minutes).