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What is a Cable Jacket?

Cable jacket is the outermost layer of the cable, serving as the most important barrier for maintaining internal structural safety in the cable. It can provide mechanical, moisture-proof, fireproof, anti oxidation, and chemical protection for the conductors inside the cable, protecting the cable from damage during and after installation, and extending its service life.

Cable Sheath Material

Cable Jacket Material Comparison

Both network cables and fiber optic cables have different cable jackets to choose from. Each type of sheath has different advantages. Below, we will introduce several of the most common types of cable jacket material.


LSZH (Low Smoke Zero Halogen) jacket is an outer sheath made of environmentally friendly materials that produces less smoke and toxic gases when exposed to fire. The price of LSZH sheath is relatively high, but due to its environmental friendliness and safety, it is very suitable for indoor environments with strict safety requirements, or situations that require attention to personnel safety and equipment protection.


PVC (Polyvinyl Chloride) jacket is one of the most commonly used cable outer sheath materials, which has good wear resistance, corrosion resistance, and aging resistance. PVC sheathing has a long service life and a relatively low price, but when it burns in a fire, it releases toxic gases and a large amount of black smoke. It is commonly used in general indoor wiring environments.


PE (Polyethylene) is an excellent plastic material with good weather resistance and corrosion resistance. PE cables are resistant to water, sunlight, and extreme temperatures, and have strong resistance to oxidation, ultraviolet radiation, and chemicals in daily environments. They are very suitable for outdoor and other exposed work applications and extreme environments.

How to Choose Jacket Material for Your Cable

According to different application environments and requirements, using different materials of outer sheaths can meet various performance requirements of network cables and fiber cables.

When choosing the right cable jacket material, following factors need to be considered:

  • Usage environment
  • Security requirements
  • Mechanical performance
  • Electrical performance
  • Cost control

After considering all factors comprehensively, you can choose the most suitable jacket material for your cable needs.

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