Source: "The 100 Unwritten Norwegian Social Laws"
In all other instances, Norwegians will suspect that you have a hidden agenda
Norwegians will not talk to others unless they have a good reason to do so
Small talk are not part of the culture
The only other exception is when you are in the mountains or in "Syden"
Then you are allowed to say "hei" and talk to strangers
It is best to do it at a path "crossing" in the mountains where it is easier for Norwegians to escape if they feel trapped by the conversation
Read more about our amazing Norwegian friends in Our Social Guidebooks to Norway