Firstly check the multimeter thoroughly. Then insert the other lead into the slot on the right side. The meter should have a reading of 220 to 250 vac. It would be best if you even considered safety more than ever when dealing with AC as high as 120 or 220 V. You can use it to check whether the socket is live, how much voltage it is putting out, whether the wires are reversed and many other things.. Having door bell problems, wanting to check the input side of the transformer to make sure it is getting 240v. Here are five steps that make using a multimeter to test the Voltage of live Wire effortless: Step 1: Safety When dealing with a live wire, or electricity, safety is paramount. This selection should be labelled with a V with a wavy sine wave over the letter. Anything else is probably beyond for an average DIY enthusiast, and in the case that you do need to conduct an advanced test, I highly recommend that you call in a professional. We have started video tutorial series on 'How to use multimeter' in our channel 'Being Engineers' and in this video, we will show you 'How to safely measure AC voltages using multimeter'. Consequently, read the value being displayed, and it needs to be between 110 to 120 volts. This also applies to 3 and 4 prolong outlets; neutral prolong is usually L-shaped. I have a multimeter, is it ok to put the red probe on the live and the black on the neutral wire to test for current (MM set on the correct voltage dial)? If so the socket typically has a round hole for earth ground, a larger slot for the current return and a smaller slot for the “hot” 120 VAC side. In this Beginner’s Guide, we’ve shown you How To Use a Multimeter. Depending on the precise model, the execution may differ. Placing test leads in A or MA inputs and then measuring voltage will create a short in the measurement circuit. Turn the dial or select the button on the multimeter so that the meter measures voltage in an A/C circuit. The points should be checked manually. You’ve learned how to measure voltage, current and resistance, and how to check continuity. A multimeter is one of the best tools for testing and diagnosing a plug socket. Once correctly plugged in, your voltage reading value should be between 220-240 volts. Power outlets in North American homes generally supply 110 volts, but some provide 220~240 … How to Use a Multimeter to Test Voltage of Live Wires. Check that is it damp or any type of damage on it. This tells you power is available at the outlet. How to test a wire for power with a multimeter without making contact. Check that there is any kind of crack, burned part, internally disconnected or loosens part on it. A multimeter is an essential tool in any electronics lab. Unless you are a professional electrician, a multimeter can be a confusing instrument to use with all the buttons, numbers and symbols. Insert either lead into the ground opening until no metal is showing on the lead. If it is also useful in condition, then you can start your job. A multimeter can help you determine: If power is actually reaching an outlet; If the outlet is properly grounded; Whether wiring within the outlet is reversed; How to Test an Outlet with a Multimeter in 8 Simple Steps. When different from an expected measurement, voltage is more likely to be lower than normal. The digital multimeter can also check for reversed wires or a bad ground. Plug in the black test lead into a neutral slot and your red test lead in the hot slot. Analysis of AC voltage measurements. In general, all ac voltage sources vary from fluctuation in ac voltage over power distribution systems. In general, you press the non-contact voltage button and hold the top of the multimeter close to the source you want to measure. If it is ok, then check its leads properly. The easiest way to test wire for voltage using a multimeter is by testing the power socket because you only need to plug the probes in. Some advanced digital multimeter models have a contactless voltage meter. Learn the essentials of outlet testing safety. You will get an introductory video of this multimeter whose link is given in the description of this video. If you’re looking for a multimeter, you may found this post useful Best Multimeters Under $50. Are you talking about wall socket voltage in the US.