Electrician Red Seal · Question
Which device is used to measure insulation resistance, often at high voltage, to check the integrity of motor windings or cables?
A Megger (or insulation resistance tester) applies a high DC voltage to a conductor and measures the resulting leakage current to determine the insulation resis
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Question: Which device is used to measure insulation resistance, often at high voltage, to check the integrity of motor windings or cables?
Answer options:
- Voltmeter
- Ammeter
- Ohmmeter ✅ Megger (insulation resistance tester)
Correct answer: Megger (insulation resistance tester)
Explanation: A Megger (or insulation resistance tester) applies a high DC voltage to a conductor and measures the resulting leakage current to determine the insulation resistance, which indicates the condition of insulation.
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- A residential garage is to be wired with a 15 A, 120 V duplex receptacle. According to the Canadian Electrical
- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
- A commercial kitchen is being renovated, and several new 4 kW, 208 V, single-phase electric ovens are being in
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