A multitude of problems can arise from electrical systems and complex wiring. Having the ability to test and quantify voltage, current, resistance, voltage drop etc. can mean the difference between properly working electronics and potential damage to these same components or, worse, danger to human life.
Electrical Troubleshooting is vital to any safely assembled circuitry. Instruments which can measure the quality of Ground Fault Circuit Interrupters (GFCIs) can mean the difference between life and death. A current leak can mean a dangerous short circuit or potential fire hazard and should always be located and repaired. All of these circumstances can be avoided and electrical systems properly understood by simple circuit testing with safe and easy to use instruments.