Why is the insulation layer of the armoured electrical cable so thick?

Why is the insulation layer of the armoured electrical cable so thick? such as the 6mm, 10mm, 16mm armoured cable. The armoured electrical cable is mainly suitable for medium or high voltage occasions, so the sheath layer is thicker.

Generally, the higher the voltage level, the thicker the sheath will be. The armoured electrical cable is mainly suitable for some mobile, outdoor and oil-contaminated occasions, so a thicker insulating layer is required, and it must have the advantages of cold resistance, oil resistance, and wear resistance.

Factors Affecting Insulation Thickness of Armoured Electrical Cable

(1) During the production and laying process of the armoured electrical cable, such as the 6mm, 10mm, 16mm armoured cable, the insulating layer will be subjected to external forces such as tension, compression and impact, and the size of the cross-sectional area of ​​the conductor has a great influence on the numerical value of these stresses.

As the cross-sectional area increases, the bending stress and self-weight of the cable also increase, so the insulation thickness also increases with the increase in the cross-section of the wire core. In addition, in order to meet the electrical performance, the voltage level of the product is increased, and the insulation thickness will be appropriately increased.

(2) Consideration factors of the thinnest point of armoured electrical cable insulation need to consider process and aging issues. For the same material, faster aging damage will generally affect the life and aging, such as the thinnest insulation of armoured electrical cable,for example, the 6mm, 10mm, 16mm armoured cable, the thickness is not less than 0.3mm, and the thickness of PVC is not less than 0.25mm.

(3) For products with the same voltage level and sheath structure, from the perspective of electrical performance, the insulation thickness can be reduced accordingly, but the armoured electrical cable needs to be moved frequently, which requires higher safety. In fact, it is not necessarily thin.

Welcome to contact us for the price of armoured electrical cable, the common sizes we have now in our factory are 6mm, 10mm, 16mm armoured cable.