Ground Rod Resistance To Earth

For instance if a ground rod is driven into a very rocky and dry area it may not conduct electricity into the ground well.

Ground rod resistance to earth.

Ground ring ground rods. The procedures for earth resistance testing are referenced in ieee standard no. 2 point dead earth method. If this is the case for your ground rod the best solution is to drive a different rod into a different location.

The goal in ground resistance is to achieve the lowest ground resistance value possible that makes sense economically and physically when contacting the earth also known as the soil ground rod interface. The lower it is the better job it does. For example the national electric code requires no greater than 25 ohms of resistance in a ground system. For a safe electrical system your ground rod resistance should have a very low resistance value.

Make sure that you have stripped back the insulation from both ends of the wire to allow for a good connection. Unfortunately as time goes by factors such as ground rod corrosion soil moisture high salt content high temperatures and loss of contact of your wires as well as others may increase the resistance of ground rod s hence affecting its effectiveness. You can only do this by using the fall of potential method with a three terminal earth ground resistance tester. In areas where driving ground rods may be impractical the two point method can be used.

Step 1 connect your length of wire to a metal stake in the ground. The function of any ground rod is to dissipate the current that is recovered in any faulty electrical circuit near your house to the earth surrounding the ground rod. Treatment of the soil. If you do not have one already you can easily install a ground rod for your home.

To properly test the resistance of a ges you must follow some simple rules. Go back to ways to improve earth electrode resistance 3. You should measure the resistance of an electrode with respect to the surrounding soil in the area. Run the wire to your test location.

Four of the most common methods of ground resistance testing used by test technicians are discussed below. In some instances ground rods can be installed in areas where the earth has a lot of resistance.