Outwardly, it looks like a regular screwdriver with a flat tip, but differs from it in functionality and design.
, and amazon phone number list are two contacts on the body of the screwdriver – the metal tip itself and the metal contact at the end or on the side of the handle.
If you touch the phase wire with such a screwdriver, and the contact on the handle with your finger, a weak current will flow through this circuit, which will be enough to light the lamp.
However, it will not work from the neutral wire, since there is usually no voltage on it. There are different types of indicator screwdrivers.
The simplest ones are with a neon lamp in the case
They are less sensitive to current and light up only at 60 handley not only revolutioniz content above. These are rarely sold anymore and are only found in electricians’ stocks.
Their modern versions are L! indicator screwdrivers with a signal amplifier. They are also call! “testers”. Now more common are multifunctional models that can detect the presence of current, and also work as a “continuity tester” and can determine the phase without damaging the wire insulation, and also in the walls under the finishing layer.
And all this is also thanks to the built-in signal amplifier
Which makes the bulb glow even america email the smallest signal at the input.
Some also have a built-in sound indicator for convenience, and several more sensitivity modes. So, let’s figure out how to use an indicator screwdriver with a battery or its more modern version in the form of a tester with sound indication.
How to check the phase with an indicator screwdriverWhen working with electricity, it is often necessary to accurately determine which of the wires is the “phase” and which is zero or “zero”.
To do this, use an indicator screwdriver as follows:Take the screwdriver, touching the contact pad at the end of the handle with your fingers.