1.Place noodles in medium heatproof bowl, cover with boiling water; stand until just tender, drain. Using kitchen scissors, cut noodles into random lengths.
2.Place noodles in medium bowl with carrot, cabbage, fish sauce, sugar and juice; toss gently to combine.
3.To assemble rolls, place 1 sheet of rice paper in medium bowl of warm water until just softened. Lift sheet from water carefully; place, with one point of the square sheet facing you, on board covered with tea towel. Place a little of the vegetable filling and one mint leaf vertically along centre of sheet; fold top and bottom corners over filling then roll sheet from side to side to enclose filling. Repeat with remaining rice paper sheets, vegetable filling and mint leaves.
4.Combine ingredients for sweet chilli dipping sauce in small bowl; serve with rolls.