With the caveat that there is a significant difference between people, you need 2 units for 0.05 and 3-4 for 0.08. A pint of beer is 2 units and a glass of wine 2 to 3 units
but you metabolise alcohol at about a unit an hour
So ignoring the suggestion that you have to be at 0.02 8 hours before coming on duty and the idea that bar staff call the police if you order a pint (I dont believe either), it seems Norway is identical to the UK, Europe and almost everywhere else.
The only difference is that they remand people in custody as opposed to giving bail