Heavy Power Cords

Easy,

Take a piece of black teflon heatshrink tubing (1/2" O.D. ?) carefully cut or trim it to the appropriate length with scissors or a razor blade and stretch it over the end of the power cord's IEC.

Some lube that dries will help slip it on easier.

I cut up cheap 7/16" thick foam work shop floor tiles and stack them horizontally for strong support under all my cables and especially the P/C's where they attach to the equipment.

Sort of like the other mention of it... I'd add some layers of heat shrink, one at a time until the fitting was snug.

Of course, that's not helping the contacts get tighter but will help the cords from pulling loose.... also, I use plain old string to trace up the heavier cords to the rack itself... thereby taking the strain off the connection.

Blindjim suggestion is similar to my own, I use Tiewraps to hold the AC cable in place so there is no strain on the connector.

Likely the same results as he gets with string.

+1 to Samhar.

I use anything I can find to support the connector from underneath so that it is level (i.e., pencil erasers). Have this problem especially with my small DAC and a 14g PC, but also with my big ONK 805 avr and a 12g PC.