What is the nominal gas pressure for IGS cable insulation measured in pounds per square inch gauge?

The nominal gas pressure for IGS (Insulated Gas System) cable insulation is standardized at 20 pounds per square inch gauge. This pressure is crucial because it ensures the insulation material maintains its dielectric properties effectively while also helping to keep contaminants out of the insulation system. Maintaining the correct nominal pressure is essential to ensure reliability and performance in electrical applications.

The other options may represent different types of pressure ratings or specifications in other contexts but do not align with the standard nominal gas pressure for IGS cable insulation. Understanding these specifications is critical for ensuring compliance with safety standards and maximizing the integrity of electrical systems.