Where should the leads of an earth resistance tester be installed to check a ground?

To effectively check a ground using an earth resistance tester, the leads should be installed at a specified distance from the probe to ensure accurate readings. This distance is important to avoid interference from other grounding systems or structures. In this case, the leads should be spaced 64 feet away from the probe. This distance allows for a suitable measurement of the earth resistance by providing enough separation to minimize the effect of nearby conductive paths that could distort the results.

Using this configuration ensures that the measurements taken reflect the actual resistance of the ground system and not influenced by other factors such as nearby grounding systems or the properties of the soil too close to the probe. Other distances either too short or too long can lead to inaccurate measurements due to these interferences or the limitations of the tester's range. Thus, spacing the stakes 64 feet away strikes a balance that allows for reliable readings while adhering to standard testing methodologies.