thanx for all information so far the 5,10,20 rule sounds like it can work well and i will keep it in mind when working. And i like the idea of the emergency shut-off switch
just to put light on the matter i'm sure fire/rescue would come out to every call but they are just so understaffed and vechiles & equipment so outdated i guess we'll have to have some real $h#t hit the fan before the government will think of spending money on them.