This is usually in the form of an extruded PVC or cross-linked polyethylene jacket, often combined with an aluminium sheath under the surface for electromagnetic shielding.
[6] In many applications, this jacket adds significant mechanical protection, making the cable much more rugged.
They are often used to simplify the physical setup of a system and provide a neater connection between two pieces of equipment.
[9] For example, in sound reinforcement, a multicore cable is often used to connect all the microphones on stage to the mixing console.
[10] This type of multicore is often advantageous in home wiring as it minimizes the number of cables run through the subfloor or ceiling cavity of a building.