Short runs of flexible power cord?

I have had to put objects, such as wood boxes, bricks, VPI Bricks and books near the connector to relieve tension at the connection point. I have also attached string to the connector and attached the string to the wall with a screw at the outlet. I have also used Velcro ties to secure the cable to the equipment rack. This works well in rack mounted equipment.
Heavy cords can be a problem.
I do not re-call ever seeing a power cord shorter than 1 meter.
Joe Nies

Stiff powercords can be challenging.
I have propped them up, stuck them to the back of the rack with zip-ties...
My favorite prop up devices are butyl rubber bottle stoppers size 10 and size 7.
I use them under feet of equipment, and stack them up under too heavy cords to keep them from tilting out.

I've been dressing power cords since the day they got big.

Mapleshade has some very flexible power cords. They can custom make a short run as well.

I bought two 3' Audience PowerChords on Audiogon during the past year.