> Basically you need to increase the capacitance of the main 
> cap (the one that is in series with the supply). Use ohms
> law but work with the impedance of the capacitor at line 
> frequency for w=2*PI*f

An approximation is I = 6fCV

230V, 50Hz, 1uF, I = 6 * 50 * 0.000001 * 230 = 0.069A
120V, 60Hz, 1uF, I = 6 * 60 * 0.000001 *120 = 0.043A

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