For RC Models
If the working area borders with a flat area, a flower bed, a small cliff (not more than 0.4in/1cm), or a small stair (up to 2in/5cm), the Perimeter Wire should be laid 8in (20cm) inside the working area. This prevents the wheels from driving into a ditch. Use the shorter distance of the RoboRuler to set the distance of the wire from the lawn edge.
![Edge Perimeter Wire Installation - RC Models](/media/20cm-from-edge-rc.png)
For RS Models
If the working area borders with a flat area, a flower bed, a small cliff (not more than 0.4in/1cm), or a small stair (up to 2in/5cm), the Perimeter Wire should be laid 1ft/32cm inside the working area. This prevents the wheels from driving into a ditch. Use the shorter distance of the RoboRuler to set the distance of the wire from the lawn edge.
![Edge Perimeter Wire Installation - RS Models](/media/32cm-from-edge-rs.png)
For RX Models
If the edge is relatively flat, lay the wire at RoboRuler distance II (10.2in/26cm) from it.
![Flat Edge Perimeter Wire Installation - RX Models](/media/26cm-from-flat-rx.png)
If the edge is a drop, use distance III (36cm) of the RoboRuler to prevent the wheels from driving into a ditch:
![Edge Perimeter Wire Installation - RX Models](/media/36cm-from-edge-rx.png)
If the working area borders with a flower bed (or any other soft obstacle, that you want to avoid Robomow bumping into it), lay the perimeter Wire at distance IV (45cm):
![Island Perimeter Wire Installation - RX Models](/media/45cm-from-island-rx.png)