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 × 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 m.
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
The depth to which the earth electrode must penetrate the soil when a high-output energizer is used is 1 m.
Step 4
2.1.4 How would you know when an isolator, like the one below, is cracked?
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Answer
Signs that indicate an isolator is cracked include:
It will make sparks and thereby cause interference.
Visually, there may be visible cracks or damage.
Step 5
2.1.5 How are electric fence wires protected against rust?
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Electric fence wires are 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
A neat drawing should include the following components:
