If overvoltages (short-duration rises of voltage) can occur in an installation, the design and dimensions of the electrical insulation are also determined by the magnitude of possible over-voltages and by the short-term electrical strength.
Ray, North Dakota. Ray is a city in Williams County, North Dakota, United States. The population was 592 at the 2010 census.
For the community in southeast Minnesota named Dakota, see Dakota, Minnesota. Dakota County is the third-most populous county in the U.S. state of Minnesota. As of the 2010 census, the population was 398,552. The county seat is Hastings. Dakota County is named after the Dakota Sioux tribal bands who settled in the area.