Lesson plan, powerpoint, plug diagram, unsafe plug worksheet and answer and some homework and extension tasks. Covers part of P2.4.1 Household electricity. Describe the design and function of a three-pin mains plug, including the materials and the colours of the wires, explain why it is important that appliances are double-insulated, explain why it is necessary to connect some appliances to the earth via the earth wire, explain in detail the choice of materials used for the mains parts of a three-pin mains plug.
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