A voltage tester is a device used to check the flow of electrical current through a circuit, outlet, or battery. Testers come in various models. They are useful for making sure that equipment is working properly. A voltage tester can also be used to check whether it is safe to work on a circuit.
The most basic use for a voltage tester is to find out whether current is flowing through a circuit. Similarly, it can be used to make sure that no current is flowing before an electricianstarts work on the circuit. A voltage tester can also determine whether the circuit is grounded properly and whether it is receiving adequate voltage. Voltage testers intended for household use should be accurate up to 500 volts.
The simplest and cheapest form of voltage tester is the two-wire model. This type of voltage tester has three parts: a bulb, a pair of insulated wires, and a pair of test probes connected to the ends of the wires. When current flows from the probes to the wires, the light bulb illuminates.
