When safety is at stake on electrical jobs, do the megger test correctly the first time. Measure the electrical resistance of insulators with a megohmmeter to ensure proper insulation of charged wires. Our selection of insulation testers provides choices related to power (battery operated, line powered, or hand cranked megger meters), inclusions, features, and degrees of accuracy, among other considerations. Your safety around equipment related to power generation and distribution is paramount. Make sure your cable and wire jacketing is appropriate. For more on the measurement of electricity, see our digital multimeters, test leads and probes, power meters and analyzers, and voltage detectors.