Find answers to the most common questions about electrical tools & testers.
Unplug devices, press the reset button, and check for internal fuse failure (replace if needed).
Ensure the circuit is unpowered, probes are in the Ω (ohms) ports, and the component is isolated (not in-circuit).
Match the wire gauge (AWG) to the load: 16 AWG: Lights/small electronics (<10A). 14 AWG: Power tools (10–15A). 12 AWG: Heavy-duty equipment (15–20A)
Never! It risks overheating and fire. Use a single heavy-duty cord or install more outlets.
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