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.
Cavalier Air Force Station and Icelandic State Park are both located in Pembina County. The first Icelandic immigrant settlement in present-day North Dakota was in Pembina County in the late 1870s, when a colony of settlers from Iceland moved into the county from the New Iceland homesteads near Lake Winnipeg.