Megger (Insulation Resistance Tester)
A specialized test instrument that measures the insulation resistance of conductors and electrical equipment using a high DC voltage, typically 250V to 1000V.
Detailed Explanation
Megger testing detects insulation breakdown before it causes failures. Acceptable readings vary by application but generally should be at least 1 megohm per 1,000 volts of operating voltage plus 1 megohm. Low readings indicate moisture intrusion, damaged insulation, or contamination. Megger testing is performed on new installations before energizing, during troubleshooting, and as part of preventive maintenance programs.
Don't just memorize terms.
Master the exam.
Get access to 650+ exam-like questions, detailed explanations, and specific state law-supplements for your state.
Which of the following best describes the concept of Megger (Insulation Resistance Tester)?