Direct buried telco/power joint or random runs require grounding every how many kilometers?

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Multiple Choice

Direct buried telco/power joint or random runs require grounding every how many kilometers?

Grounding long direct-buried telco and power runs at regular intervals creates a continuous, low-impedance path to earth so fault currents have a reliable route and each joint stays bonded to the same ground reference. The standard interval of about 1 mile (1.6 km) is used because it effectively limits the potential rise along the path and helps protective devices trip quickly during faults, while keeping the installation practical. If joints are spaced much farther apart, the impedance can become high enough to delay clearing faults or cause unsafe voltage differences; more frequent grounding adds cost without essential benefit in normal practice. So, grounding every 1 mile (1.6 km) is the appropriate requirement.

Grounding long direct-buried telco and power runs at regular intervals creates a continuous, low-impedance path to earth so fault currents have a reliable route and each joint stays bonded to the same ground reference. The standard interval of about 1 mile (1.6 km) is used because it effectively limits the potential rise along the path and helps protective devices trip quickly during faults, while keeping the installation practical. If joints are spaced much farther apart, the impedance can become high enough to delay clearing faults or cause unsafe voltage differences; more frequent grounding adds cost without essential benefit in normal practice. So, grounding every 1 mile (1.6 km) is the appropriate requirement.

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