The stupidest power cable question ever

Some power cords, those of a heavier gauge (which are the lower numbers -- that much I know), are marketed for high-current applications. Others, the higher numbers and lighter gauge, are said to be for sources. Fine and fine.
What I' wondering is this: I've now got enough power cords of enough different types lying around that I sometimes like to mix and match, see what might sound different, preferably better, on this or that component. Is putting, say, a lighter gauge cord on a high-current component, a power amp, for example, simply unwise because of how it is likely to sound, or might doing this cause some damage, or worse?
Thanks.
(Told you at the top it was a stupid question.)