The process is the linear molecular structure of polyethylene (PE) material through a specific processing way, so that it forms a vertical mesh structure of crosslinked polyethylene. The long-term allowable working temperature is increased from 70 ° C to 90 ° C (or higher), and the short-circuit allowable temperature is increased from 140 ° C to 250 ° C (or higher), which greatly improves the actual performance under the premise of maintaining its original excellent electrical performance.
Precautions
1. Cable Specifications
Verify the exact specifications of the cable, including its voltage rating, temperature rating, and suitability for direct burial or conduit installation. Check the manufacturer's datasheet for detailed information on the cable's properties and limitations.
2. Cable Handling and Storage
Handle the cable with care to avoid kinking, twisting, or excessive bending which can damage the insulation or conductors. Store the cable in a dry, cool environment away from direct sunlight and chemicals that could degrade the XLPE insulation.
3. Trench Preparation
The trench should be wide and deep enough to accommodate the cable without undue tension or compression. Ensure proper bedding and backfill materials are used to protect the cable from mechanical damage. Sand or fine gravel is often recommended for bedding.
4. Protection Against Moisture
Use waterproof tapes or heat shrink sleeves at joints and terminations to prevent moisture ingress. Consider using waterproof compounds or sealing systems if required by the installation environment.
5. Jointing and Terminating
Use appropriate tools and techniques for making joints and terminations. Follow the manufacturer's instructions meticulously. Ensure all joints and terminations are tested for continuity, insulation resistance, and integrity before covering them up.
6. Mechanical Protection
Install warning tapes or markers above the buried cable to alert future excavators of its presence. In areas with high risk of mechanical damage, consider additional protection such as conduit pipes, sandbags, or protective covers.
FAQs
Can XLPE cable be buried?
XLPE cable is made of a thermoset material, which means it is highly resistant to heat, moisture, and chemicals. This makes it an ideal choice for applications where the cable will be exposed to harsh environmental conditions, such as underground or underwater installations.
Which is better, XLPE or PVC?
XLPE provides greater tensile strength, elongation and impact resistances compared with PVC. This cross-linking process also enhances the material's resistance to oil and chemicals even at elevated temperature; this makes XLPE a popular pick as insulation for LSZH Flame Retardant or Fire Resistant cables.
Does XLPE cable need to be in conduit?
XHHW-2 Wire, also known as XLPE wire is a general-purpose wire that is suitable for applications in conduits, raceways, feeders, and branch circuits. It is also often found in power distribution systems in industrial, commercial, and residential buildings.
Is XLPE the same as PEX?
Automotive ducts and housings: PEX also referred to as XLPE is widely used in the aftermarket automotive industry for cold air intake systems and filter housings.
Is XLPE water resistant?
3 XLPE insulated wires and cables have excellent mechanical, waterproof and radiation resistance properties, so they are widely used.
What is XLPE insulation used for?
Common applications of cross-linked polyethylene (XLPE) are in building plumbing (or pipework) systems, as insulation for high voltage cables, and as an alternative for polyvinyl chloride (PVC) and copper tubing in water pipes.
What is the thickness of XLPE insulation?
We can manufacture XLPE starting from 3 mm up to 140 mm thickness.
What type of foam is XLPE?
Cross-linked polyethylene (XLPE) and Ethylene-Vinyl Acetate (EVA) foams are fine celled, chemically cross-linked materials with a micro-cellular structure. This type of material has a smooth surface, great shock absorption, and chemical resistivity.
What is XLPE made of?
XLPE cable is made from polyethylene (PE) as raw material, which is cross-linked by special electronic accelerators (or chemical methods). Cross-linking technology can change the molecular structure of polyethylene, thereby greatly improving its insulation performance.
What is XLPE equivalent to?
XLPE (Cross-Linked Poly Ethylene) insulation is found in XHHW, or RHH/RHW conductor types and generally exceeds the specs of standard building wire like THHN/THWN, which have simpler PVC insulation, but have a Nylon (the N at the end) jacket that is used to resist abrasion when pulling.
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