Some multimeters have a port that says “10A” next to it. This is used to measure large electrical currents up to 10 amps.
Some multimeters also allow you to measure Amps and Ohms in addition to voltage.
AA, AAA, C, and D batteries: 1. 5V DC. [1] X Research source Car battery: 12. 6V DC. [2] X Research source Electrical outlet, light switch, light fixture: 120V AC. Dryer/Stove Outlet: 220V AC.
You can also purchase accessories for your probes, such as alligator clamps or banana plugs.
Correct: If both yellow lights are lit up and the red light is dark, this indicates that the outlet is working in most cases. If either the hot or neutral lights are dim, this indicates that the wire is in poor condition. Open Hot: If all lights are dark, this indicates that there is no electricity coming from the hot (black) wire. Electricity may be shut off, or the wire may be disconnected, or bad. Open Neutral: If the second yellow light is lit, but the red and first yellow lights are dark, this indicates that the neutral wire is not getting any electricity. The neutral (white) wire may be disconnected or need to be replaced. Open Ground: If the first yellow light is on, but the second yellow light and the red light is dark, this indicates that the ground wire is not getting any electricity. The ground (green) wire may be disconnected or need to be replaced. Reversed Polarity: If the red light and the first yellow light are lit, this indicates that the hot and neutral wires are reversed. The outlet needs to be re-wired so that the hot and neutral wires are switched. The hot wire wired to the ground could also give this reading. Hot and Ground Reversed: If the red light and second yellow light is lit, but the first yellow light is dark, this indicates that the hot and ground wires are reversed. It could also indicate that the neutral wire is bad and the polarity is reversed. If you get this reading, the entire outlet needs to be re-wired.
Some non-contact voltage testers require you to press and hold a button to power it on. The device will either chirp, display a light, or both to indicate that it is on.
Once you confirm a light switch does not have a live electrical current, it is safe to remove the light switch When testing a three-way switch, be sure to test all screw terminals on both switches before continuing.
Once you confirm that the light fixture does not have an electrical current, it is safe to remove the light fixture from the ceiling. [7] X Research source
