NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable
Our NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable provides economical self-supporting overhead distribution. Consisting of an XLPE-insulated aluminum phase conductor (75 mm² or 95 mm²) supported by a bare ACSR or AAAC neutral messenger without an overall jacket, it meets AS/NZS 3560 and utility requirements. The design reduces material costs while delivering high tracking resistance and mechanical strength for spans up to 100m. Excellent UV and moisture performance ensures longevity in exposed conditions. The NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable offers low installation effort, minimal sag, and reliable power delivery for 600/1000V networks. Widely favored in Australia and New Zealand for residential, commercial, and rural service drops requiring lightweight, neutral-supported overhead cables with proven compliance and durability in diverse climates.
Construction
Technical Specifications
Quality Control
Application
Construction
NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable Constrution
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
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
Application
Duplex and Triplex NS75/NS90 Service Drop Cable is intended to deliver single-phase power from the secondary overhead power line or pole-mounted transformer to the service entrance conductors at the user’s building or other structure.
Application Description
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 a pole line secondary with service splices at the pole (also refer to CEC rule 12-318). The NS75/NS90 cable is rated for use on systems having nominal voltages of 600 V or less.
Technical Specifications
NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable
NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable
| 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 Duplex Unjacketed Overhead Neutral Supported Cable
Raw Material Test
NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable, raw material testing commences with aluminum phase conductor certification for alloy and mechanical properties. Messenger material (ACSR/AAAC) undergoes galvanization uniformity and conductivity verification. XLPE compound faces Congo red testing, volume resistivity, and tracking analysis per AS/NZS standards. The structured process: receipt documentation review, random sampling, physical/mechanical testing (tensile, yield), chemical spectroscopy confirmation, accelerated aging and tracking trials, and material release decision. This comprehensive evaluation secures premium inputs, forming the base for the NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable's phase insulation performance, messenger reliability.
Process inspection
Process inspection during NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable manufacturing involves real-time quality checks. Phase conductor forming monitors strand uniformity. XLPE insulation extrusion includes online spark testing and ovality control. Messenger placement verifies coverage and tension balance. No jacket extrusion per design. Critical steps: pre-extrusion compound dryness check, parameter stabilization, real-time eccentricity monitoring, gel fraction sampling, partial discharge intermediate scanning, and defect removal protocols. This multi-stage assurance maintains the NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable's precise geometry, reliable messenger support, strong phase insulation adhesion, and AS/NZS compliance throughout production.
Finished Product
Completed NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable reels face strict tests. Mandatory routines: DC resistance, high-potential AC test, insulation thickness, messenger resistance, and tracking withstand. Extended tests include heat cycling and water tightness. The sequential process: sample conditioning, voltage ramp application, timed exposure to heat/water, recovery phase inspection, property re-measurement, and documentation. Additional verifications ensure marking permanence and flexibility. Passing all confirms the NS75/NS90 Duplex Unjacketed Overhead Neutral Supported Cable's tracking resistance, messenger effectiveness, mechanical endurance, and suitability for critical overhead neutral-supported applications.
Application
Excellent for single-phase overhead service drops in suburban housing, rural properties, and light commercial sites. Commonly installed from poles to buildings in Australia/New Zealand networks requiring economical, self-supporting neutral-supported cables for reliable power distribution.
Technical Advantages
● 30+ years of manufacturing experience
● ISO and UL certified production
● Customized cable and transformer solutions
Product Packaging
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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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