According to Wikipedia, there is different kind of extinguishers according to the powder used.
They are sorted by class of fire :
- Class A: Ordinary combustibles. Class A fires consist of ordinary combustibles such as wood, paper, fabric, and most kinds of trash.
- Class B/C: Flammable liquid and gas
- Class C or Class E: Electrical
- Class D: Metal. Class D fires consist of combustible metals such as magnesium, potassium, titanium, and zirconium.
- Class K or Class F: Cooking oils and fats (kitchen fires)
I propose to use the simplest classification possible : use the letter of the class(es) directly on the tag fire_extinguisher, e.g :
- fire_extinguisher=A for an extinguisher class A
- fire_extinguisher=BC for an extinguisher class B and C
Classification is not the same globally
The classification system seems to vary between different regions, see here for a comparison table: http://en.wikipedia.org/wiki/Fire_extinguisher#United_States I suggest to use a more literal tag like fire_extinguisher_class=ordinary_combustibles etc. --Dieterdreist (talk) 10:33, 23 April 2015 (UTC)
Powder description instead of type of fire
Thanks for the feedback. I am not expert at all on the topic therefore I am open to describe with literal description. I just double checked in my office (in France) and couldn't find easily any "literal" mention. One the other way the class A and B were clearly mentioned. Therefore I think we will have to create a conversion table.
I tried to find an international standard for classes but couldn't find any. Therefore what if, instead of mentioning the combustible (e.g. ordinary combustible) we mention the powder. After all, in OSM we try to describe the physical elements themselves, not the use of them.
Therefore I propose the categories mentioned here https://en.wikipedia.org/wiki/Fire_extinguisher#United_Kingdom that are : water, foam, dry powder, Carbon dioxide (CO2), Wet chemical, Class D powder, Halon 1211/BCF