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2.1 Explain why copper is suitable for the manufacturing of electrical cables - NSC Agricultural Technology - Question 2 - 2020 - Paper 1
Question 2
2.1 Explain why copper is suitable for the manufacturing of electrical cables. 2.1.2 Discuss THREE safety requirements that must be considered when installing the e... show full transcript
Worked Solution & Example Answer:2.1 Explain why copper is suitable for the manufacturing of electrical cables - NSC Agricultural Technology - Question 2 - 2020 - Paper 1
Step 1
Explain why copper is suitable for the manufacturing of electrical cables.
Answer
Copper is highly suitable for electrical cables due to its excellent conductivity, making it efficient for transmitting electricity. Additionally, it is a good conductor of heat which facilitates its use in various electrical applications. Its properties such as lightweight and malleability allow for easy joining and crimping, providing durability and flexibility in installations.
Step 2
Discuss THREE safety requirements that must be considered when installing the electric cables and leads of electric fences.
Answer
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Insulation: Connecting leads that run inside buildings must be effectively insulated from the earth to prevent electrical shock hazards.
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Burial Guidelines: Leads that run underground should be buried at appropriate depths and marked, ensuring they do not intersect with other utility lines.
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Separation from Data Cables: Electric leads must be installed keeping a safe distance from communication or data cables to avoid interference and damage.
Step 3
Draw a labelled sketch of a lightning arrestor installed on an electric fence.
Answer
A labelled sketch of a lightning arrestor should show the main components including the clamp, electric fence line, isolator, and ground rods. The diagram should accurately indicate the grounding system that helps divert lightning strikes safely into the ground.