How to secure a large power cord to a piece of equipment?

+1 chayro

Thanks everyone for your thoughts. The same power cord fits very tightly into my Innuos server. I have it propped up just a bit w/ a wood block but I will also try a few turns wrapped around the connector w/ the self fusing tape too.

You may experiment with a Styrofoam cup or the inside of a toilet paper roll, both cut to the proper height...

If you need a thinner tape, teflon plumbers tape, the kind used to wrap pipe threads, works well and makes it easy to get an exact fit. Also comes off easily without leaving any adhesive residue.

+1 on teflon tape.  Easy to try one wrap or two...

I use small blocks of pink foam.  Easy to adjust size and wedge them under the 

cable to the shelf below.

At the wall it is all about having an outlet with great grip.  Many opinions here but

my dedicated 20 amp lines go to PS Audio outlets.  Relatively inexpensive at 5 for $200.  They grip very well.