Find answers to the most common questions about electrical tools & testers.
Set to AC voltage (~V), insert probes into hot and neutral slots—a working outlet reads 110–120V (US) or 220–240V (EU).
Power strips add outlets only; surge protectors have joule ratings (600+ for basic protection) to block voltage spikes.
Press the protection indicator button (if equipped). No light? Replace it. For certainty, use a multimeter to test outlets.
A non-contact tester detects live wires without touching them, while a multimeter measures voltage, current, and resistance precisely.
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