Another consideration is the relationship. between insulation class, temperature rise, and ambient temperature. The insulation. class rating designates the maximum. operating temperature for a winding. The. temperature rise is the difference between the.
China claims it has discovered the world's largest hole, and it's in one of the most dangerous places on the planet. 1  Jul.  Good news: China claims it has discovered the world's largest hole. On Wednesday, state broadcaster CCTV announced that the newly found dragon's hole, a 984-foot (300-meter) cavern in the disputed waters of the South China Sea, is now the world's largest hole.
Deanâs Blue Hole, located near Long Island in the Bahamas, was previously considered the worldâs deepest underwater sinkhole. Also a top location for divers, Deanâs Blue Hole has a diameter of about 82 to 115 feet on the surface, reports Atlas Obscura, but widens to about 330 feet as it deepens.