Things are getting interesting when someone's out in the sticks, say almost 1 km from the transformer (not all that unusual in Europe) and then needs power somewhere outside - achieved by plugging in two 50-m extension leads, 1.5 mm2. That's perfectly legal because in Austria and Germany voltage drop and short circuit current calculations only apply to fixed wiring but I doubt a short at the end of those 100 m (around 330 ft.) would do anything to a 16 A breaker but eventually trip the thermal overload. Since there are no mandatory maximum trip times for short/overload many even consider it relatively harmless to exceed the maximum VD in fixed wiring.
