A farmer has to erect an electric fence around the buildings on the farm for security reasons - NSC Agricultural Technology - Question 2 - 2017 - Paper 1
Question 2
A farmer has to erect an electric fence around the buildings on the farm for security reasons.
2.1.1 Name the minimum size of the warning sign for an electric fence... show full transcript
Worked Solution & Example Answer:A farmer has to erect an electric fence around the buildings on the farm for security reasons - NSC Agricultural Technology - Question 2 - 2017 - Paper 1
Step 1
2.1.1 Name the minimum size of the warning sign for an electric fence.
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Answer
The minimum size of the warning sign for an electric fence is 100 mm by 200 mm.
Step 2
2.1.2 Write down the minimum distance between two separate electric fences with different energizers.
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Answer
The minimum distance between two separate electric fences with different energizers is 2 meters.
Step 3
2.1.3 Name the depth to which the earth electrode must penetrate the soil when a high-output energizer is used.
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Answer
When using a high-output energizer, the earth electrode must penetrate the soil to a depth of 1 meter.
Step 4
2.1.4 How would you know when an isolator, like the one below, is cracked?
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Answer
An isolator is cracked if it shows visual signs of damage and if it makes sparks, which may lead to interference.
Step 5
2.1.5 How are electric fence wires protected against rust?
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Answer
Electric fence wires are typically protected against rust through galvanizing or copper coating.
Step 6
2.1.6 Make a neat freehand drawing of a standard electric fence with various essential components.
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Answer
The drawing should include the following components:
Battery
Energizer
Poles
Wiring (both + and -)
Isolator
Earth spike
Ensure the layout is correct and label at least one component.
