Power Line Clearances

NEC 230:
(B) Clearances. Overhead conductor spans for system not over 600V must maintain the following clearances: Figure 230-11 230-24B.cdr

(1) 10 ft at the electric service entrance to buildings, at the lowest point of the drip loop of the building electric entrance, above finished grade, sidewalks, or platform or projection from which they might be accessible to pedestrians, where the voltage is not in excess of 150V to ground.
(2) 12 ft above residential property and driveways, and those commercial areas not subject to truck traffic, where the voltage does not exceed 300V to ground.
(3) 15 ft above those areas listed in the 12 ft classification, where the voltage exceeds 300V to ground.
(4) 18 ft over public streets, alleys, roads, parking areas subject to truck traffic, driveways on other than residential property, and other areas traversed by vehicles such as cultivated, grazing, forest, and orchard. Department of Transportation (DOT) type right of ways in rural areas are many times used by slow-moving and tall farming machinery to avoid impeding traffic flow.


22 ½ ft over pools:

Utility power lines that run over a pool or spa must be at least 22.5 feet above the water level or base of a diving platform. Communications cable must be at least 10 feet above the water level or diving platform. The water level is defined as the highest point water can reach before it spills out of the pool or spa. It is always preferable to install a pool or spa well away from any electrical lines, or vice versa. The water is one thing to worry about; another is the use of pool cleaning nets with very long, metal handles that you lift high into the air.