Bambu Lab A1 causing voltage fluctuation (India)

i recently got myself a bambu lab a1. initially i had an earth leakage issue which was fixed by using a 3 pin power cord instead of the included 2 pin one. i am also having noticeable voltage fluctuation (flickering lights) while printing.

the current consumption is only around 0.5 max but there's flickering of lights especially when there's sudden direction change in all axes. (i have connected the printer to a higher ampere socket)