# How many joules do I need for electric fence?

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Typical recommendation is one joule per mile of fence. Keep in mind that bigger is better, until the point that induction occurs. Induction will power gates and neutral wire when voltage gets too high. Anything nearing 7,000 volts may cause induction.

## How much power does an electric fence need?

Hardly any power is consumed by an electric fence, as it just maintains a voltage. No appreciable current is involved. An animal or a person accidentally touching it will give a shock sufficient to repel, and would not cause serious harm to someone trying to intrude.

## Will 12 joules electric fence hurt dog?

No it is not dangerous. Most electric fences are used to keep animals (pets, livestock or wildlife) in or out. They use voltages that will shock (sting) not kill.

## How many joules do I need for an electric fence for bears?

Bears are more likely to pay attention to an electrified fence that delivers a painful shock. For deterring bears in developed areas, your energizer will require a minimum joule rating of: 0.7-1.0 stored joules or 0.5-0.7 output joules.

## How many joules does a cattle fence need?

Gerrish recommends 1 joule of output per mile of fence, regardless of how many strands of wire. If there’s a total of six miles of fence, it requires a minimum of a 6-joule energizer.

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## Does electric fence use AC or DC?

A term used to describe electric fence controllers that pulse electricity at regular intervals through a fence, typically at one-second internals. An output capacitor is used to store direct current (DC) electricity between pulses through a fence. Alternating current (AC) can’t be stored using a capacitor.

## How do I increase the voltage on my electric fence?

Make use of your fence’s cold wires (assuming you have some steel posts) as extra earthing to improve the voltage at the end of your electric fence. Connect them all the way throughout your fence starting from the main energizer earth stake. This means taking an earth wire and a live wire under every gate.