Each fence design consists of plain wires that are alternately earthed or energised. Recommendations on the most suitable type of energiser, insulators and other components can be obtained from Agriculture Western Australia. For features of electric fencing, see Figure 2 . Line posts spaced every 20 to 30 m depending on the terrain. Line posts, either 165 cm steel posts with insulators or 50 mm wandoo or creosote-treated mallet.
Wires are alternately earth and live, with the bottom wire earthed.
Bottom wire 5 to 7 cm above ground. This prevents goats from pressing on the bottom or middle of the old fence. See Figure 3 . Goats are naturally agile and can climb over fallen logs and angle struts at end assemblies. Therefore, fence lines must be free of such obstacles.