The minimum clearance between the ground and a 220 kV line is 7.0 meters. This is to ensure that people and objects do not come into contact with the high voltage wires and are not electrocuted. The clearance is also necessary to prevent damage to the wires and equipment from falling objects.
Option A is incorrect because it is the minimum clearance for a 132 kV line. Option B is incorrect because it is the minimum clearance for a 115 kV line. Option C is incorrect because it is the minimum clearance for a 69 kV line. Option D is correct because it is the minimum clearance for a 220 kV line.
The minimum clearance for a power line is determined by the voltage of the line. The higher the voltage, the greater the clearance required. This is because the higher the voltage,
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