What is the current carrying capacity of a single stripboard track?
The track of a stripboard is 2mm (78 mil) wide. The holes drilled into them are 0.8mm (31 mil) in diameter, leaving a total (0.6mm [23 mil] on each side of the hole) of 1.2mm (47 mil) for a maximum usable current path. Thickness of Veroboard/Stripboard at 1 ounce per square foot is 35 microns (1.37 mil) thick.

Assuming that you have an ambient of 25 degrees C (77F) and can tolerate of up to 50 degrees C (90F) more, then fed into a pcb track width calculator it spits out:

5.4 Ampere

http://www.desmith.net/NMdS/Electronics/TraceWidth.html