When installing any electric fence, it is important to also install an electric fence alarm. An alarm will alert you to the loss of voltage in the fence wires due to an interruption in the power supply, or voltage being carried through the wiring, due either to a power outage or a break in the circuit. A break in the circuit can happen if a line is cut or broken by an intruder or animal. If voltage is lost, the electric fence will not be effective in keeping either intruders out or animals in. Without an alarm, there isn't really any way for you to know that the fence is "down" until you realize the cows are out or there is a burglar in your home. Here you will find information on installing the alarm to work in conjunction with the electric fence.
Step 1 - Prepare Alarm
Start by thoroughly reading all instructions on your particular alarm and reviewing all diagrams. The installation really only requires 3 steps, but it is helpful if you familiarize yourself completely with your particular alarm. Some alarms need to be calibrated for each individual situation. Regardless of the alarm that you choose, is to disable the electric fence system so that there is no power being run to it. This will prevent you from being shocked.
Step 2 - Connect Alarm
You will connect the alarm to your existing system with three basic wires: the power supply wire, and the positive and negative wires. Most alarms have knobs that can be loosened to expose the connecting post. Loosen the nut on the post that is marked as being the negative connection (this is usually colored black). Wrap the ground wire around the post and tighten the knob. Make sure there is no bare wire exposed. Connect the other end of the negative wire to the ground. Next, loosen the knob for the positive (this is usually colored red) connection. Attach the end of the fence wire to the positive post and tighten the knob to secure it. Finally, connect the power supply, whether this is to a 12 volt batter or 12 volt AC adapter.
Step 3 - Test the Alarm
Reconnect the power supply to the fence system and make sure that the alarm is properly detecting the voltage that is now running through the wiring. There are typically 3 LED lights on the side of the alarm: no voltage, low voltage, or normal voltage. If the system is completely connected and it is not detecting any voltage, recheck all connections to make sure they are not interfered with. If the system is showing low voltage, make sure there are no interruptions to the fence wiring or that there are not obstructions or objects against the wiring. Test the system by breaking the circuit at some point in the fence perimeter or a connection to make sure the alarm is triggered.