It is essential that your electric fence is properly insulated along its full length. Insulators are designed to take all wire types on wood or steel posts, and special clips are available for fibreglass posts. The following diagram shows some of the methods of insulating your fence at internal corners, external corners, and at straining posts. Porcelain insulators are generally regarded as being a longer life insulator, but are more expensive, more difficult to put on, and can suffer from cracking.
Plastic insulators are easy to use, offer optimum insulation, and are relatively inexpensive.
Good quality plastic insulators such as those manufactured by Daken are U.V. resistant and therefore offer a longer service life.