Category 7 10-gigabit network cable

Detailed Structure Explanation of Category 7 Network Cable (CAT7
Category 7 network cables are F-class network cables that comply with the ISO/IEC 11801 standard. They feature a double-shielded design and are specifically designed for high-speed and stable data transmission. The following is its complete structural composition:
1. Core conductor (wire core
Material: High-purity oxygen-free copper (purity ≥99.9%), diameter approximately 0.58mm (22-23AWG)
Structure: 8 single-core copper wires, with every two twisted together to form a pair (a total of 4 pairs)
Features: Ultra-low resistance, excellent electrical conductivity, ensuring stable signal transmission with minimal attenuation
2. Insulating layer
Material: High-density polyethylene (PE) or expanded polyethylene
Structure: Each conductor is wrapped with a layer of insulating material to prevent short circuits between the cores
Function: Isolate electromagnetic interference, improve signal transmission quality, and resist oxidation
3. Wire pair shielding layer (inner shielding)
Structure: Each pair of twisted wires is wrapped with a layer of metal foil shielding (usually aluminum foil).
Material: Aluminum-polyester composite film (with the aluminum side facing outward), fully covering the twisted pair
Mark: F (Foil, foil shielding)
Function: Independently shield each pair of wires to prevent signal crosstalk between wire pairs
4. Overall shielding layer (outer shielding)
Structure: Four pairs of wire harnesses are wrapped with a layer of metal braided mesh
Material: High-density tin-plated copper wire woven mesh, with additional aluminum foil for some products
Logo: S (Shield, total shielding)
Function: Resist external electromagnetic interference and form dual protection
5. Drain Wire
Location: Inside the main shielding layer
Material: Tin-plated copper wire
Function: Guide the electromagnetic interference induced by the shielding layer into the ground to enhance the anti-interference effect
6. Outer sheath
Material: PVC or low smoke zero halogen (LSZH) environmentally friendly flame-retardant material
Features: Wear-resistant, flame-retardant, oil-resistant, corrosion-resistant, and heat-resistant (-20℃ to +80℃)
Function: Protect the internal structure from physical damage and extend the service life
Complete structural hierarchy (from the inside out) :
Conductor → Insulating layer → twisted pair → wire pair shielding (aluminum foil)→ Overall shielding (metal mesh + ground wire)→ outer sheath
Double shielding technology of Category 7 network cables (S/FTP)
S/FTP: Shielded Foil Twisted Pair, that is, the combination of total shield + wire pair foil shield
Advantages
Each pair of wires is independently shielded to reduce crosstalk between pairs (the near-end crosstalk value is extremely low)
The overall shielding layer resists external electromagnetic interference and ADAPTS to strong electrical environments
Dual protection enables a transmission frequency of up to 600MHz and supports a rate of 10Gbps
The key difference from Category 6 network cables
Category 6: Unshielded (UTP) or single shielded (STP) can be adopted, with only one layer of overall shielding
Category 7: Double shielding (S/FTP or SSTP) must be adopted, with each pair of lines having an independent shielding layer
Performance: The Category 7 bandwidth (600 MHZ) is 2.4 times that of Category 6 (250MHz), significantly enhancing transmission stability
Summary
The double-shielded structure of Category 7 network cables is the core of their performance: pair shielding and overall shielding form a "double armor", effectively isolating internal and external interference and ensuring high-speed and stable transmission at 10Gbps. This design makes it particularly suitable for scenarios with extremely high requirements for network stability and bandwidth, such as enterprise data centers, industrial automation, and professional audio-visual rooms.