Need a heavy duty receptacle

There are "twist lock" outlets and plugs ranging from 15amps on up to 240v 60amp for appliances. A good electrical supply will carry a selection. I used 3-20amp "twist locks" to power my rack of gear. I have them floor mounted, It weighs about 400lbs and doesn't get moved often, but I sure don't want them coming out without my knowing . . .

Porter Ports are installed, but have to report that they don't hold the power cords any better than the outlets I replaced. I did manage to "form" the power cords (they are stiff!) so that they are resting on the floor, which now picks up most of the weight of them. It'll work unless someone hits one with the vacuum.
Don't get me wrong, the Porter Ports are far superior in quality than the cheap outlets I replaced, and I probably would have replaced them anyway.

Jonoulman,
I'm aware of the twist lock plugs and outlets in the electrical supply stores. I would imagine you had to make a DIY power cord?

Yes. I love amplifiers and vintage gear so mono-blocks and bi-amping leaves me with a load of power cords that can be tweaked. They tend to be spendy purchased so I make them with off the shelf parts. These guys take it a bit farther than I do but what the hay? http://www.carveraudio.com/phpBB3/viewtopic.php?f=39&t=11564&start=0
Same electric supply should have "safety cable" that will hold plugs into outlets. I have seen theses in pro audio applications.

Porter Ports are installed, but have to report that they don't hold the power cords any better than the outlets I replaced.
07-23-12: Markpao

Markpao,

Just curious.... Did you install the receptacles with the equipment ground up?
.

Yeah, I tried that way first. Then turned it around after I saw it backed out just the same. I think now after spending more time with this, that the problem is more to the fact that the power cords are so stiff, than the actual weight of them. Like I mentioned, I have them molded so the floor actually supports them and keeps them fully plugged in now.
Thanks for all your help.