I have an existing standard light switch that controls a single outlet.  I would like to replace the switch with a dimmer switch. 

The dimmer instruction expects two black wires and two white wires (and a ground) in the box, but there is only a single white and a single black (and a ground). The white wire and black wire come from the same larger white wire, where the first layer of sleeve has been removed to show the two of them. 

How do I wire this up correctly? 

**Instructions**
[![enter image description here][1]][1]

**Wall Box**
[![enter image description here][2]][2]

**Dimmer Switch**
[![enter image description here][3]][3]


  [1]: https://i.sstatic.net/BXeYS.jpg
  [2]: https://i.sstatic.net/Abnkw.jpg
  [3]: https://i.sstatic.net/E0iED.jpg