electrical tester
nounUK /ɪˈlɛktrɪkəl ˈtɛstə/
US /ɪˈlɛktrɪkəl ˈtɛstər/
A tool that checks if electricity is in a wire or plug.
Dad used an electrical tester to see if the socket was safe.
OTHER MEANINGS
2. A small screwdriver with a light inside that glows when it touches a live wire.
The electrician checked the switch with a screwdriver-style electrical tester.
3. A device that checks whether a circuit is complete and working.
He used an electrical tester to find the broken wire in the lamp.
4. A plug-in gadget that shows if a wall outlet is wired correctly.
The electrical tester showed the outlet had no ground connection.