Introduction to NYY Type Three-Core Cable Product Details
I. Core Information of the Product Itself
(I) Analysis of Specification Parameters
This product is a NYY type three-core cable, covering four specifications: 3-1×70mm², 3-1×95mm², 3-1×120mm², and 3-1×150mm². The rated voltage is 0.6/1kV, and it belongs to
Copper Core polyvinyl chloride insulated and
Sheathed Cable (Cu/PVC/PVC) with conductor class 2. All parameters meet industry standards and can meet the standardized requirements of low-voltage power distribution scenarios.
Basic Specification Classification
The product includes four mainstream cross-sectional area specifications: 3-1×70mm², 3-1×95mm², 3-1×120mm², and 3-1×150mm². "3-1×" represents a three-core independent insulation structure. Each core conductor is independently wrapped with an insulation layer and then uniformly covered with a sheath, which effectively avoids interference between core wires. The cross-sectional area increases from 70mm² to 150mm², corresponding to different current-carrying capacity requirements. The long-term allowable current-carrying capacity of the 70mm² specification is about 160A, 95mm² is about 200A, 120mm² is about 230A, and 150mm² is about 270A (at an ambient temperature of 25°C). Users can accurately match according to the load power.
Voltage and Conductor Grade
The rated voltage is 0.6/1kV, where 0.6kV refers to the phase voltage and 1kV refers to the line voltage, which conforms to the low-voltage power distribution system standards and is suitable for civil and industrial low-voltage power grids. The conductor is of class 2, which is made of stranded multi-strand fine
Copper Wires. Compared with class 1 hard conductors, it is more flexible, and compared with class 5 soft conductors, it has higher mechanical strength. It balances laying
Flexibility and structural stability, and is especially suitable for fixed laying scenarios with slight bending requirements.
(II) Material and Process Characteristics
Three-Layer Structure Design
Conductor: High-purity electrolytic copper (Cu) is used, with a copper content of ≥99.95% and a conductivity of ≥58MS/m, ensuring low power transmission loss. The surface is annealed to improve flexibility.
Insulation Layer: Polyvinyl chloride (PVC) insulation is adopted, and the thickness increases according to specifications (about 1.4mm for 70mm² and about 1.8mm for 150mm²). The insulation resistance is ≥100MΩ·km (at 20°C), and the temperature resistance range is -15°C to 70°C, which can effectively block current leakage.
Sheath: The outer layer is also made of PVC material, added with antioxidants and weathering agents, with a thickness of 2.0-2.5mm. It has UV resistance, acid and alkali resistance, and wear resistance. The elongation at break of the sheath is ≥125%, ensuring stable operation in humid, dusty and other environments.
Advantages of Production Process
A continuous production line of "conductor stranding → insulation extrusion → core cabling → sheath extrusion" is adopted. Both the insulation layer and the sheath are formed by high-temperature extrusion, which are closely attached to the conductor without bubbles or impurities. During cabling, a concentric arrangement is adopted, and inert materials are filled to ensure roundness and reduce mechanical stress during laying. The finished products undergo more than 20 tests such as power frequency withstand voltage test (3kV/5min without breakdown) and partial discharge test (≤10pC) to ensure stable quality.
(III) Characteristic Applications and Scene Adaptation
Core Application Fields
Based on material and performance characteristics, the cable is mainly used for fixed laying in low-voltage power distribution systems, including:
Advantages of Scene Adaptation
In dry indoor environments, it can be directly laid openly or concealed in walls and floors; in humid or slightly corrosive workshops and basements, it can replace some
Armored Cables by virtue of the corrosion resistance of the
PVC Sheath; the flexibility of class 2 conductors enables it to meet the bending requirements during pipe laying (the minimum bending radius is 10 times the outer diameter of the cable), reducing construction difficulty.
(IV) Comparative Advantages with Similar Products
Compared with VV
Type Cables (polyvinyl chloride insulated and sheathed cables), NYY type adds filling and binding processes during core cabling, resulting in higher roundness and less distortion during laying; compared with YJV type cross-linked polyethylene
Insulated Cables, this product has lower cost, and the PVC sheath is better in mechanical protection, suitable for scenarios sensitive to budget and without high-temperature (>70°C) requirements; among cables of the same specification, the current-carrying capacity of class 2 conductors is about 5% higher than that of class 1 hard conductors because the multi-strand structure has a larger heat dissipation area.
II. Description of General Product Information
(I) Packaging Specifications
Packaging Form
Wooden reels or steel-wood structure cable reels are used for packaging. The reel diameter is adapted according to the length (200m/reel: 1.2m in diameter; 500m/reel: 1.8m in diameter). Both ends of each reel of cable are sealed to prevent moisture from entering; the reel is marked with specifications, length, voltage level, production date, batch number and other information, with product certificates and test reports attached.
Packaging Protection
The outer side of the cable reel is wrapped with a waterproof film, the wooden part is painted with anti-corrosion paint, and the edges are equipped with guard plates to prevent collision; a Φ50mm shaft hole is reserved in the center of the reel shaft for hoisting and transportation; the maximum weight of each reel is controlled within 2 tons (about 1.8 tons for 500m of 150mm² specification), which is suitable for conventional forklifts and cranes.
(II) Transportation and Storage Requirements
Transportation Specifications
Road transportation: Use flatbed trucks, place and fix the cable reels horizontally, isolate adjacent reels with buffer pads, and pad rubber pads at the contact points between the binding belts and the reel body to avoid damaging the sheath;
Storage Conditions
It should be stored in a dry and ventilated indoor warehouse to avoid direct sunlight and rain 浸泡；cable reels need to be elevated (≥10cm above the ground) and away from heat sources (≥1m away from heating, boilers, etc.); the storage period should not exceed 2 years. If it exceeds, the insulation resistance (≥100MΩ) must be re-inspected before use.
(III) Delivery and Sample Services
Delivery Process
Order confirmation: Verify the specifications and quantity within 1 working day after receiving the order, and confirm the inventory (more than 5,000 meters of conventional specifications are in stock);
Sample Policy
1-meter-long samples can be provided for free (limited to 1-2 sections/specification). The samples include a complete structure (conductor, insulation, sheath) and are attached with material test reports; samples are sent by express, and the freight is borne by the demander, which can be deducted from the payment after placing an order; samples support destructive testing (such as cross-sectional analysis, temperature resistance testing) and provide testing guidance.
(IV) After-Sales Service Guarantee
Quality Commitment
The product warranty period is 2 years (from the date of delivery). If quality problems such as insulation breakdown and sheath cracking caused by non-human damage occur within the warranty period, free replacement will be provided and round-trip freight will be borne; lifelong technical support is provided, including current-carrying capacity calculation and laying scheme consultation.
Problem Handling
Respond within 2 hours after receiving quality feedback and propose a solution within 48 hours; for on-site testing, arrive within 24 hours in adjacent provinces and 48 hours in remote areas; for returns and exchanges due to wrong specifications, they can be handled within 7 days if the product is not laid and the packaging is intact (the demander bears the round-trip freight).
Additional Services
Provide cable head production instruction videos and manuals; can assist in contacting local laying construction teams (fees are additional); regularly visit users to understand usage conditions and provide maintenance suggestions (such as regular sheath cleaning and insulation resistance testing).
In summary, NYY type three-core cable has become the preferred product for low-voltage power distribution scenarios due to its complete specifications, reliable materials, and strong adaptability; the perfect packaging, transportation, and after-sales system further ensures the full-process reliability of the product from production to use. Users can choose the appropriate specifications according to load requirements and laying environment and enjoy professional products and service support.
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