Telephone Interference
If you find there is Telephone Interference on your Fence use the following flow to determine if your fence is likely to be causing interference on telephone lines.
NOTE: At any point in time you can edit an answer by clicking the edit Icon next to the question you want to change.
Tip
The number of earth stakes will vary depending on the power of the energizer and the soil type.
High powered energizers need more earth stakes than low powered energizers.
Dry, sandy, rocky or frozen soil will require more earth stakes than wet soils.
Safety
Designing electric fences to prevent interference
1. Draw a plan of the property approximately to scale showing:
All electrified wires.
The connecting leads between Energizer, fence and ground rods.
Wires crossing gateways and roads (including underground)
Communication cables/lines
A 640’ wide shaded stripe centred on each side of the communication cables/lines
2. Highlight any electric fence wires
Within the shaded area
That run parallel to communication cables/lines and are within 330’ of them (running at right angles is OK and shouldn’t cause a problem)
What Not to Do – an interference heavy layout
1. Highly conductive lead out line runs down the driveway/road, adjacent to communication cables/lines
2. Ground rods are connected in parallel to communications cables/ lines
3. Highly conductive lead out line is less than 330’ from and not at right angles to, communication cables/lines when it crosses the road
What To Do – a clean fence
1. Energizers and lead out are at least 330’ away from communication cables/lines.
2. Sections of the fence that are less than 330’ away are as short as possible and left open-circuited at the far end (i.e. nothing connected to the far end).
3. Electric fence ground is separate from all other grounding systems, is as short as possible, and is routed away from communication cables/lines.