How to Use a Voltmeter

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A voltmeter is used specifically for measuring voltage. Use a voltmeter properly with tips from a certified HVAC tech and plumber in this free video on electrical repairs.

Part of the Video Series: Electrical & Plumbing Repairs
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Video Transcript

Hi I'm James with JNC Home Repair and today I'm going to demonstrate how to operate a volt meter. What we have here today is a, this is actually a multi-meter but it measures voltage and a volt meter does the same thing. It is just strictly for measuring voltage. There is basically two different types of voltage that you can measure for. There is an AC current and there is a DC current. DC current is a direct current. That is what DC stands for. Basically the symbol, I don't know if you can see. There is a solid line and then there is a broken line and that identifies a direct current circuit. You you need to know that in case you have a diagram that is showing you the different circuits and what kind of circuits you have and that way you know if you have a direct current or an alternating current and then that is the symbol for an alternating current which is usually in homes, what is hooked up to the light switches, to the lights, and to the plugs. How you use this thing. Let's say you are testing for voltage inside a home, most of the voltage inside a home is 120 volts and on your meter you always want to have it set to a setting that is higher than your voltage in your house and on a meter it is either 200 or 600 so you want to put it on the 200 setting for 120 volt circuit. Now if you are measuring 220 voltage like something going to an air conditioner, that is going to be 220 volts. You are going to want to bump up your meter to 600 volts. That way your meter is able to measure the circuit correctly. Basically all of what you do like say for instance we have a switch here or we have a plug here and on this plug the black or the gold, the brass colored screws are the hot and on the other side the chrome colored screws are the neutral and all you do to test for voltage is get your black and red wires and you put your black on the hot which is the brass colored wires and you put the red on the neutral on the chrome colored screws and that will give you a reading on the meter on what the voltage is. It should be anywhere from right there at 120. It will probably say 119 or 118 or whatever. That is basically all there is to using a volt meter. You just want to make sure that it corresponds with the different types of circuits that you are measuring for. If you have any more questions concerning voltage, you can log on to my website


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