Monitor Cable Manufacturers introduced that the main function of the outer sheath of the power cord is to protect the inner sheath of the cable from mechanical damage and chemical corrosion and to increase the mechanical strength of the cable, that is, to play a tensile and compressive role.
Because the outer sheath is mainly to prevent the influence of external factors on the inner sheath, such as example, to prevent the erosion of oil, chemical solvents, etc., the impact of mechanical force, the aging of the atmosphere, etc. The outer sheath is usually very thick, and at the same time plays the role of wear resistance.
Specifically, the inner sheath of the power cord, that is, the sheath that wraps the conductor, is mainly used to protect the conductor from contact with water or air and other substances, to prevent the conductor from being damp, and to accelerate oxidation. On the one hand, it also acts as a tensile force. The protective conductor is not easily broken. The sheath function of the shielded power cord is also beneficial to protect the insulation and shielding layer inside so that the metal shielding net is not easy to oxidize, and it is better to add an inner sheath between the insulation and shielding, which is to avoid the shielding layer. The burr pierces the insulation, and the outer sheath is used to prevent the influence of external factors on the insulation and shielding.