The selection quality of waterproof rubber cables directly determines the operational safety and service life of the entire electrical system in special water related projects such as garden and water landscape supporting facilities, river construction, deep well water intake, underwater electromechanical equipment power supply, and outdoor water infrastructure. The vast majority of construction teams, project procurement, and grassroots electrical personnel commonly have industry misconceptions: they believe that rubber materials have inherent sealing and waterproof properties, and ordinary rubber sheathed cables can be used for long-term immersion in water. However, from a large number of frontline engineering cases, blindly mixing ordinary cables to replace specialized waterproof rubber cables is the main cause of insulation water leakage, conductor oxidation and blackening, line leakage tripping, equipment shutdown and scrapping. In severe cases, it can also trigger safety accident