Question 157Electricity & Electronics - Assistant Engineer

The correct answer is D) 150 megohms. The megger scale shown in Figure A illustrates the resistance reading at each point on the scale. At the "1" marker, the resistance reading is 150 megohms, which means the electrical resistance measured is 150 million ohms. The other answer choices are incorrect because: A) 150 ohms is too low for a megger scale reading. B) 150 thousand ohms is also too low for the "1" marker on the megger scale. C) 120 megohms is lower than the correct reading of 150 megohms.