sentences:  Electrical leakage can also occur due to moisture, salt, dust, and dirt buildup on open air insulators in overhead power distribution.If the leakage in these cases is severe enough, it can lead to a pole fire.The term "stray voltage" is used for the gradient (rate of change with respect to distance) of electrical potential in the surface of the soil, associated with single-wire earth return electricity distribution systems used in some rural locations.