Safety devices
1 mark · NormalWhy is the earth wire important in plugs with metal casings?
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Correct option: It provides a safe path for current if the casing becomes live.
Common mistakes: Choosing option 1 or 2, confusing the function of the earth wire
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Marking points
B1 · 1 mark · Selects correct option
Worked solution
The correct answer is: It provides a safe path for current if the casing becomes live.