I would avoid the "hospital grade" outlets because they have contacts that are plated with nickel for corrosion resistance. Check out the industrial "spec grade" outlets from Pass and Seymour instead... Solid brass triple-wipe contacts that GRIP!!! The Pass and Seymour 20A #5362A really made a difference in my system. You can get them for about 12.50 ea. from bestroute.com.
