Multimeter
A versatile test instrument that measures voltage (volts), current (amps), and resistance (ohms), and often includes additional functions like continuity testing and capacitance measurement.
Detailed Explanation
The multimeter is the most essential diagnostic tool for electricians. Digital multimeters (DMMs) have largely replaced analog meters due to their accuracy and ease of reading. When measuring voltage in electrical panels, a CAT III or CAT IV rated meter is required for safety. Proper use includes selecting the correct function, range, and ensuring the meter leads are in good condition.
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