cable separation

Any ideas for keeping powercords and interconnects apart? Something like we use to keep sparkplug wires apart. What have you tried?
Telephone pole insulators work great,look great and are cheap...The ones ( of course ) with the nice big groove in the top............I have them from 3" tall to 10" tall and love the look.....Recycle those old insulators........!
I found the pole insulators to work well but are heavy. I found that 1" foam pipe insulation found at Home Depot, for example, at about $1.25 for a 6' length is ideal - separates cables from one another, separates cables from adjacent racks to insulate from vibration, is inexpensive, and is easily cut to any length with a pocket knife.