Here's why:
* Safety: A single, continuous line creates a significant risk of the horse being electrocuted if it touches the fence at two points simultaneously. This could happen if the horse leans against the fence, rubs against it, or accidentally gets its leg entangled.
* Effectiveness: A single line doesn't provide enough of an electric "shock" to effectively deter a horse from touching the fence. Horses are large and powerful animals, and a single line can be easily pushed through or knocked down.
* Maintenance: A single line is more susceptible to damage and is harder to repair than a multi-wire fence.
Instead of a single line, electric fences for horses typically use:
* Multiple wires: This creates a wider "electric field" that is more effective at deterring horses from touching the fence.
* Insulated wires: These wires are designed to prevent accidental electrocution by preventing electricity from flowing through the horse's body.
* Proper grounding: This ensures that the electricity has a safe path to the ground and doesn't flow through the horse.
Always consult with a qualified fence installer or experienced horse owner for guidance on building a safe and effective electric fence.