Waterproof power cables are waterproof cables. Their waterproofness is primarily due to their outer layer, which is typically made of plastic and rubber.
Generally speaking, waterproof cables include those laid in inland waterways or on the seabed. These cables typically have a longitudinal waterproof barrier layer and are usually armored. The waterproof layer is typically made of plastic and rubber.
JHS waterproof cable insulation materials: The insulation is made of waterproof rubber; the cable filling is also made of waterproof rubber; and the cable sheath is made of waterproof rubber. Suitable for submersible pumps, coal mines, and underwater operations.
The principle of waterproof wire: Waterproof wire is based on the principle of total internal reflection of available light at the interface between two media. In step-type optical fiber, n1 is the refractive index of the core medium and n2 is the refractive index of the cladding medium. If n1 is greater than n2, light entering the fiber core at the interface between the core and cladding (referred to as the core-cladding interface) at an angle greater than the critical angle for total internal reflection, θc, will be reflected, and no light energy will escape the core. The incident light can then be transmitted forward through countless total internal reflections at the interface. When an optical fiber is bent, the interface normal shifts, reducing the angle of incidence. Consequently, some light rays have an angle of incidence less than θc and are not fully reflected. However, light rays with larger angles of incidence are still fully reflected. Therefore, light can still be transmitted when the fiber is bent, but energy loss will occur. Generally, for bend radii greater than 50 to 100 mm, this loss is negligible. However, even slight bends result in significant "microbend losses."
