A dot is drawn at the centre of each mesh of the network Z. These dots will become the circuit nodes of Z'. A conductor is drawn which entirely encloses the network Z. This conductor also becomes a node of Z'. For each circuit element of Z, its dual is drawn between the nodes in the centre of the meshes either side of Z. Where Z is on the edge of the network, one of these nodes will be the enclosing conductor from the previous step.[4]