NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable is designed to deliver three-phase power from secondary overhead power lines or pole-mounted transformers directly to the service entrance conductors of a building or structure. Rated for 600V systems, this cable combines durability, conductivity, and thermal performance, making it ideal for residential, commercial, and light industrial power distribution. Featuring three XLPE-insulated aluminum phase conductors (75 mm² or 95 mm²) supported by a bare neutral messenger (ACSR or AAAC) without an overall jacket, it offers excellent mechanical strength and weather resistance. Compliant with AS/NZS 3560, IEC, and utility standards, this cable supports 600/1000V applications with superior UV, moisture, and tracking protection. The unjacketed design reduces weight and cost while maintaining integrity for spans up to 100m. The NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable ensures low sag, easy installation, and long-term reliability in harsh conditions.
Construction
Technical Specifications
Quality Control
Application
Construction
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable Construction
Standard
NS75/NS90 cables meet or exceed the following standards
CSA C22.C No. 129
CSA listed NS75 & NS90
Sunlight resistant
CSA C22.C No. 129
CSA listed NS75 & NS90
Sunlight resistant
Conductor
2, 3, or 4 Aluminum alloy 1350-H19 hard drawn compact round conductors cabled around a neutral conductor
Insulation
Abrasion, heat and moisture resistant cross linked polyethylene (XLP) insulation rated 90°C/-40°C
Neutral
Compact round ASCR neutral. For sizes 266.8kcmil and greater, ACSR neutral conductors shall be in concentric round stranding
Description
The insulated conductors of NS75/NS90 Service Drop Cables are resistant to weathering, sunlight, abrasion, tearing, cutting and chemicals. The cable is rated 600 V with a maximum conductor operating temperature of 90°C for Cross-linked Polyethylene insulation, which allows for higher ampacity compared to NS75 cable.
Application
Quadruplex NS75/NS90 Service Drop Cable is intended to deliver three phase power from the secondary overhead power line or pole-mounted transformers to the service entrance conductors at the user’s building or other structure. NS75/NS90 cable may also be used as pole line secondary with service splices at the pole (also refer to CEC rule 12-318). NS75/NS90 cable is rated for use on systems having nominal voltages of 600 V or less.
Technical Specifications
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable Phase ID
| Cable Construction | Phase 1 | Phase 2 | Phase 3 |
| Duplex | Black with print legend | - | - |
| Triplex | Black with print legend | Black with red stripes | - |
| Quadruplex | Black with print legend | Black with red stripes | Black with blue stripes |
Quality Control
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable
Raw Material Test
Raw material testing for the NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable ensures compliance with AS/NZS and IEC standards. Phase conductor aluminum wires are inspected for purity, conductivity, and elongation using spectrometry and tensile machines. Neutral messenger (ACSR/AAAC) undergoes zinc coating mass, tensile strength, and ductility checks via wrap/torsion tests. XLPE insulation compound faces density, melt flow index, carbon black content (UV protection), and tracking resistance analysis via OIT/DSC. Samples endure accelerated aging and environmental stress cracking trials. The step-by-step process: incoming batch verification, random sampling, physical/mechanical testing (diameter, weight per length), chemical composition confirmation, corrosion/UV pre-simulation, and material release decision.
Process inspection
During manufacturing of the NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable, process inspection maintains precision. Phase conductor stranding is monitored for compactness with laser gauges. XLPE insulation extrusion controls thickness uniformity and concentricity using online X-ray systems. Messenger integration verifies lay and tension balance. No overall jacket is applied per unjacketed design. Real-time spark testing and diameter verification occur continuously. Key steps: material pre-drying confirmation, extrusion/assembly parameter logging (temperature, speed, tension), intermediate hot set tests for crosslinking degree, partial discharge monitoring, defect detection/correction, and post-process cooling control.
Finished Product
The finished NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable undergoes extensive testing for certification. Routine tests include conductor resistance, insulation thickness, high voltage withstand, messenger tensile strength, and tracking resistance. Mechanical tests cover elongation, impact, and bending. Weathering via UV and heat cycling is assessed. The process steps: sample preparation, gradual voltage/load ramp-up, timed hold/exposure monitoring, environmental conditioning (heat/UV), post-test electrical/mechanical re-measurement, and visual inspection. Additional verifications include sag-tension performance, partial discharge (≤5pC), and marking durability. Only cables passing all criteria are approved, confirming the NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable's electrical safety, mechanical endurance, tracking resistance.
Application
NS75/NS90 Quadruplex Unjacketed Overhead Neutral Supported Cable is perfect for overhead three-phase secondary distribution in residential areas, rural networks, and urban extensions. Commonly used for service drops from poles to buildings requiring self-supporting, cost-effective neutral-supported cables in moderate spans.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
Wires and Cables packaging (1)
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What are the advantages of power cables and overhead lines?(1) Reliable operation, because it is installed in a hidden place such as underground, it is less damaged by external forces, has less chance of failure, and the power supply is safe, and it will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect towers; (4) Help improve power factor.
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Which aspects should be considered when choosing the cross section of a power cable?(1) The long-term allowable working current of the cable; (2) Thermal stability once short circuited; (3) The voltage drop on the line cannot exceed the allowable working range.
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What are the measures for cable fire prevention?(1) Use flame-retardant cables; (2) Use fireproof cable tray; (3) Use fireproof paint; (4) Fire partition walls and fire baffles are installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors, otherwise local pipes or heat insulation and fire prevention measures should be taken.
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What should be paid attention to during the transportation and handling of cables?(1) During transportation, loading and unloading, cables and cable reels should not be damaged. It is strictly forbidden to push the cable reels directly from the vehicle. Generally, cables should not be transported and stored flat. (2) Before transporting or rolling the cable reel, ensure that the cable reel is firm, the cable is wound tightly, the oil pipe between the oil-filled cable and the pressure oil tank should be fixed without damage, the pressure oil tank should be firm, and the pressure indication should meet the requirements.
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What inspections should be carried out for the acceptance of cable lines?(1) The cable specifications should meet the regulations, the arrangement should be neat, no damage, and the signs should be complete, correct and clear; (2) The fixed bending radius of the cable, the related distance and the wiring of the metal sheath of the single-core power cable should meet the requirements; (3) The cable terminal and the middle head should not leak oil, and the installation should be firm. The oil pressure of the oil-filled cable and the meter setting should meet the requirements; (4) Good grounding; (5) The color of the cable terminal is correct, and the metal parts such as the bracket are completely painted; (6) There should be no debris in the cable trench, tunnel, and bridge, and the cover should be complete.
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