if you can raise the line cord off the floor , up to the hight of your lowest outlet, that may help as well. if the cable is very heavy, it may be wise to have equal distribution of elevation materials, rather than just near the outlet. if the power cord is 6 feet, 3 lifting devices may be sufficient. wood, styrofoam, or other substances are suitable.
how do you deal with heavy power cords?
I have some very heavy power cords that won't stay in a wall socket correctly, the weight pulls them down too much. It's even a problem in the IEC receptacle on the back of seveal components (I have used a foam support underneath, but that is suboptimal for obvious reasons). Has anyone developed a clamp or other kluge to hold these things in a socket? Is the only real solution to find lighter cords (and reasonable flexibility would be nice too!).