A Quick Look at Wires and Cables: The "Electric Blood Vessels" of Life
2025-08-15
Wires and cables are essential infrastructure in modern society. Like the blood vessels of the human body, they silently transport power and signals to electrical appliances and devices. Here are a few key points:
1. Basic Structure
Wires and cables typically consist of a conductor (copper or aluminum), an insulation layer (such as PVC or rubber), a shielding layer (for interference protection), and an outer sheath (for abrasion resistance). Different combinations are suitable for different scenarios. For example, household wiring often has a PVC-insulated copper core, while high-voltage cables require multiple layers of protection.
2. Common Types
Power cables: Transmit electrical energy, such as the YJV type, commonly used for building power distribution.
Communication cables: Such as network cables (twisted pair) and optical fiber, are responsible for data transmission.
Specialty cables: High-temperature resistant, flame-retardant (such as WDZ cables), or corrosion-resistant, are used in special environments such as factories and mines.
3. Safety Tips
Ampacity: Overloaded wires can heat up and cause fires. During installation, ensure they match the power rating of the appliance (for example, a 1.5 mm² copper wire can carry approximately 10A).
Aging Inspection: Cracks and discoloration in the insulation should be promptly replaced to avoid short circuits.
Purchasing Tips: Look for CCC certification and avoid inferior wire (blackened copper core or uneven thickness may indicate inferior quality).
4. Environmental Trends
New cables use halogen-free flame-retardant materials, reducing toxic fumes when burned. Solar cables are UV-resistant and compatible with the development of new energy sources.
Tips
When renovating your home, it's recommended to reserve wiring capacity to avoid future expansion issues. Outdoor wiring should be protected from moisture and rodents. While unsightly, wires and cables are the cornerstone of safe electrical use!
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