Question: how many amps can nickel strip handle?
Answer: In terms of gauge, 4.05 mm^2 is equivalent to about 12 AWG, that is, IF your strips were made out of copper. But for nickel 4.05 mm^2 CSA (or 27 mm width x 0.15mm thick) is good for about 15 AMPS, with a resistivity of around 17.5 mΩ/meter of strip...