How An Electric Line Tester Screwdriver Works
Electric line tester screwdrivers are essential tools for electricians, providing a quick and easy way to determine if a circuit is live. This type of testing is crucial for ensuring safety when working with and around electricity.
In this article, we’ll explore how these tools work, discussing their basic components and why you might choose to invest in electric screwdriver sets for your business.
What is an Electric Line Tester Screwdriver?
An electric (or electrical) line tester screwdriver is a specialised tool that determines whether electricity is flowing through a circuit. It can also identify whether a given wire is hot, grounded, or neutral.
These screwdrivers are normally cylindrical with a transparent, plastic handle and a metal tip that tapers to a flat head. The plastic handle (and tubing around the shaft) protects the user from electrical shock while handling the screwdriver.
As one of the simplest electrical testing devices, these screwdrivers are a must-have addition to any sparky’s toolbox.
Working Functions
Inside an electric line tester screwdriver’s transparent handle, you’ll find a small light (usually an LED or neon bulb). Whenever the user touches the tool’s metal tip to the circuit being tested, it will light up if it touches a wire that is conducting electricity.
You can also use tester screwdrivers to determine any electrical wiring’s polarity. Polarity describes the direction of electric current flow, and it can be positive or negative.
Alternating current (AC) electrical outlets all have at least two prongs (the holes you plug devices into). In Australia, almost all outlets have three prongs—the top two connect to ‘neutral’ and ‘hot’ wires, while the bottom prong is the ‘ground’, which protects users from electrical shock.
When you touch a tester screwdriver against the ‘hot’ wire, the bulb inside the tool’s handle will light up.
How to Use an Electric Line Tester Screwdriver
When you use an electric line tester screwdriver, the metal head must make direct contact with an exposed wire or bare metal. If you touch the head to a wire inside a plastic sheath, it will create a negative signal, even if the wire inside is conducting electricity.
Here’s the general process:
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Ensure you are competent in electrical testing processes, practices, and safety. If in doubt, contact a qualified electrician.
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Carry out a self-test to ensure your tester is working correctly. You can do this by touching both ends of the screwdriver at the same time—the LED inside should light up if the tool is functioning properly.
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Remove any covers that could impede access to the circuit.
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Touch the tip of the screwdriver to the wire you want to test. Make sure to hold the insulated handle.
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If the bulb inside the handle lights up, the circuit has power.
Always follow all applicable safety standards when working with electrical systems. Remember, if you have any doubts, contact a professional electrician.
A quick summary
Understanding how an electric line tester screwdriver works is vital for anyone working with electrical systems. With this information in mind, you’ll know how to use these tools effectively, allowing you to perform electrical work safely and confidently. Check out a range of options at RS today.
