Electric fence chargers are the real heart of an electric fencing system. Fence chargers, also called energizers, fencers or controllers come in several sizes, power options and shapes. The electric fence charger is connected to a ground system and to the fence wire.
When the system is connected properly, it forms and open circuit and it draws a low amount of power. This circuit is closed or completed when an animal touches the fence wire and the ground. Electrical shock will pass from the energizer through the fence wire, into the animal to the soil, then to the ground rods, then to the energizer again. The animal gets the shock instantaneously.
Electric fence chargers or energizers will not function properly with out the correct grounding system. With the proper ground or earthing system, electric fencers will keep livestock in and predators out.
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