For connecting light electrical devices (radio devices, table lamps, clocks, etc.) under very low mechanical stress in households, as long as this is permitted in the relevant device regulations. The cable can also be used as a speaker cable. In this case, the conductor diameter of 6 mm² is particularly suitable for connecting HiFi speakers. The cable is not suitable for connecting cooking and heating devices or for outdoor use. CCA refers to bi-metallic single and multi-core cables with a copper-clad aluminum core for higher frequency applications. The so-called skin effect, also known as current displacement, is a physical phenomenon caused by high-frequency alternating currents. The current density inside the conductor decreases with increasing frequency compared to that at the outer surface.