How to Test Earthing Using Digital Multimeter

Some time when you touch your monitor or CPU at home it gives you Electrical shock like feeling or even full Electrical shock. The Reason behind this is that most of the houses are not earthed.

Here are some simple steps to test Earthing in your home or at any organization->

Step1-->Set Your Digital Multimeter to AC testing Mode and set Max. Voltage to 750V


Step2-->Identify the Phase Earth and Neutral Pins. Generally Phase is always on right hand side and neutral on left hand side. The Description is shown in below given image.

Step3-->Measure the voltage between Phase and Neutral (it should be between 220 to 240 Volts in India). Suppose Your Reading is 235 Volts

Step4-->Measure the voltage between Phase and Earth (it should be Between 220 to 240 Volts in India)
Suppose your reading Comes 238 Volts.

Step4-->Measure the voltage between Neutral and Earth .it should be the difference of previous two readings i.e. 238 Volts -235 Volts =3 Volts

 This 3 Volts is your Earthing. Its value should not be more than 3 Volts.