Electric fences are a popular method of containing livestock and keeping them within a specific area. They work by delivering a non-lethal shock to any animal that comes into contact with the electrified wires. However, when choosing an electric fence, it’s important to consider several factors, including volts, joules, and amps.
Volts measure the strength of the electric shock delivered to the animal touching the fence. The higher the voltage, the stronger the shock. Joules, on the other hand, measure the energy delivered by an electric fence pulse. This calculation takes into account both the voltage and the amperage of the pulse, and determines the distance the pulse can travel along the fence wire while still delivering an effective shock.
Amps measure the amount of electrical current flowing through a circuit, and are used to measure the amount of current that flows through the animal’s body when it comes into contact with the fence. Higher amperage can be more dangerous to animals and humans, so it’s important to choose an electric fence with an appropriate level of amps for the animals being contained.
Overall, understanding the role of volts, joules, and amps in electric fences is essential for selecting a fence that is both effective and safe for the animals and humans who will come into contact with it. By considering these factors, you can make an informed decision and choose the right electric fence for your needs.
What are electric fence Volts?
Volts: Volts (V) measure the electrical potential difference between two points. In the case of electric fences, volts are used to measure the strength of the electric shock that is delivered to the animal touching the fence. Generally, the higher the voltage, the stronger the shock Think of it like water pressure in a hose. The higher the voltage, the stronger the force that pushes the electrical charge through the wires.
While voltage is an important factor in electric fencing, joules are actually more important for determining the effectiveness of the fence. Joules refer to the amount of energy the energizer can deliver to the fence, while voltage refers to the pressure or force of the electrical current.
Having a high voltage is not enough to create an effective electric fence. Even if the voltage is high, it doesn’t necessarily mean that the animal will receive a sufficient shock. This is because voltage alone does not account for factors like resistance, distance, and vegetation.
In contrast, joules take into account all of these factors. The higher the joules, the more energy the energizer can deliver to the fence, which translates to a stronger and more effective shock. The joule rating determines the power of the shock, and the power of the shock is what ultimately determines whether or not the fence is effective at keeping the animal contained or excluded.
Most animal electric fence energizers have a similar voltage output of around 7500 volts, but the joule rating can vary widely. It’s important to choose an energizer with a sufficient joule rating for your specific needs, taking into account factors like the length of the fence, the type of animal you are containing or excluding, and the vegetation or other obstructions that may be in the fence line.
What are electric fence Joules?
Joules measure how much energy is delivered to an animal that touches the fence. This is like the amount of water that flows through a hose when you turn on the faucet. The joule rating of the fence determines how strong the shock will be. For example, a fence with a higher joule rating will deliver a stronger shock.
Selecting the right joule rating for an electric fence depends on a variety of factors, including the length of the fence, the type of animal you are containing or excluding, and the vegetation or other obstructions that may be in the fence line.
As a general rule, a minimum of 0.5 joules is recommended for most general electric fences, with higher joule ratings being necessary for longer fence lines, thicker vegetation, or larger animals.
Here are some general guidelines for selecting the right joule rating for your electric fence:
For small animals such as rabbits or dogs, a joule rating of 0.2 to 2 is usually overly sufficient.
For larger stubborn animals such as sheep, goats, or pigs, a joule rating of 1 to 3 is typically recommended.
For calmer animals such as cattle or horses, a joule rating of 0.5 to 5 is usually necessary, with higher joule ratings being required for longer fence lines or thicker vegetation.
For predator exclusion fences, such as those used to keep out foxes or wild dogs, a joule rating of 5 or higher may be necessary.
Keep in mind that these are general guidelines only, and the actual joule rating you need will depend on a variety of factors specific to your situation. Contact us to help you choose the right electric fence energiser for your needs.
What are electric Amps
Amps measure the amount of electrical current that flows through the fence. Think of it like the amount of water that flows through a hose over a certain period of time. Electric fences are designed to deliver a low amperage shock that is safe for animals. As mentioned earlier, amps measure the amount of electrical current that flows through the fence. In electric fences, the amperage is typically very low, usually in the range of milliamps (thousandths of an amp) or microamps (millionths of an amp). This low amperage is what makes electric fences safe for animals and humans.
However, amperage can be important when troubleshooting electric fence issues. For example, if the fence is not delivering a shock to animals or is not working at all, one possible cause could be a high resistance fault in the fence system. A high resistance fault is when the current is being impeded or restricted somewhere in the fence, which can result in a weaker shock or no shock at all.
To find and diagnose high resistance faults, you can use an electric fence tester, which measures both the voltage and the amperage of the fence. By measuring the amperage, you can determine whether the fault is due to a break in the wire or some other type of resistance issue. This information can help you pinpoint where the problem is and make the necessary repairs.
Overall, while amps may not be as important as volts or joules when it comes to selecting an electric fence system, they are still a useful measure when it comes to diagnosing issues with the fence.
How many Joules should an electric fence energiser be?
The number of joules needed for an electric fence energizer will depend on a few factors, such as the length of the fence, the type of animal you are containing or excluding, and the vegetation or other obstructions that may be in the fence line.
As a general rule, a joule rating of 0.5 to 1 joule is usually sufficient for most standard electric fences used for containing or excluding livestock animals such as cattle, horses, and sheep. For smaller animals like pets or poultry, a joule rating of 0.1 to 0.2 joules may be sufficient.
However, if you are dealing with a longer fence line or a larger size and number of animals, you may need to use an energizer with a higher joule rating to ensure adequate shock delivery. Similarly, if the fence line is heavily vegetated or has other obstructions that may cause the electrical current to be impeded, you may need to use an energizer with a higher joule rating to overcome this resistance.
It’s always a good idea to consult with a knowledgeable electric fence supplier or installer to determine the appropriate joule rating for your specific needs. They can take into account all the factors specific to your situation and recommend the best energizer for your needs.
So, when selecting an electric fence system, it’s important to consider the appropriate voltage, joule rating, and amperage based on the type and size of animal you want to contain or deter. For example, a smaller animal like a rabbit or a dog might only need a fence with a low voltage and joule rating, while a larger animal like a horse or a cow might require a fence with a higher voltage and joule rating.