When installing multiple rod, pipe, or plate grounding electrodes, they must be spaced a minimum of __________ apart.

When installing multiple rod, pipe, or plate grounding electrodes, the correct minimum spacing is 6 feet apart. This distance is crucial because it helps ensure that each grounding electrode operates effectively without interfering with the others. Proper spacing enhances the overall grounding system's conductivity, reduces resistance, and improves safety by dissipating electrical faults away from buildings and equipment. Additionally, keeping electrodes at this distance helps to minimize the risk of ground loops and ensures that each electrode is capable of performing its intended function without the influence of adjacent electrodes' grounding potential.

The requirement for maintaining a minimum of 6 feet is based on standards set by the National Electrical Code (NEC) that aim to promote effective grounding practices. Proper compliance with these standards contributes to a safer and more reliable electrical system.