Originally Posted by Chris
It may but an under sized extension cord does the same thing.
Yes, so don't undersize.
Grainger seems to use a max 5% voltage drop at the necessary current, with some constraints on the total length of cords. And, stringing cords together introduces contact resistance at each connection so the length of the cord seems to be longer than that measured by a tape.
Motors need a low source resistance, a 'stiff' source; incand. lamps don't much care.