Worked well for a 15 amp plug that required the permanent wires to exit the duplex at an odd angle. I used three stranded 10 AWG marine wire (80 feet of unused #10 wires were available, no 12-14 wires) with white Romex style outer insulation, stripped wires fit perfectly into individual wire receptacles, 3 wires go to entry point connector, insulated with a few inches of 2:1 thin wall heat shrink tubing over 3 wires routed in a flat parallel configuration. It was a bit difficult to do but it is doable. I also used a dremel to cut off a bit of white nylon to open up the rounded wire entry area into a flatter area for larger wires to fit better. They fit. These plugs and other Leviton electrical products are favorites of our lit crowd.
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