The Difference Between Oxygen-Free Copper and Low-Oxygen Copper
Residential wiring primarily utilizes two types of copper materials: Oxygen-Free Copper (OFHC) and Low-Oxygen Copper (FRHC). Oxygen-Free Copper boasts a purity level exceeding 99.95% and offers superior conductivity, making it ideal for long-distance wiring runs. Low-Oxygen Copper, while containing a slightly higher oxygen content, is more cost-effective and suitable for standard, short-distance circuits. Both types meet safety requirements; the primary differences lie in their electrical conductivity efficiency and durability.
Key Considerations When Purchasing Copper-Core Wires
Inspect the Cross-Section: High-quality copper cores exhibit a reddish-purple luster and are free of impurities.
Test Flexibility: The wire should withstand being bent back and forth five times without breaking.
Check the Insulation Layer: Ensure the insulation is of uniform thickness and possesses good flame-retardant properties.
Match the Electrical Load: Use 1.5mm² wire for lighting circuits, and 2.5mm² wire for power outlets.
Application Recommendations for Different Scenarios
Concealed Wiring (In-Wall/Ceiling): Prioritize Oxygen-Free Copper to minimize the need for future maintenance.
Temporary Wiring: Consider using Low-Oxygen Copper for its superior cost-effectiveness.
High-Power Appliances: It is mandatory to use wires with a gauge of 4mm² or larger.
Humid Environments: Select wires featuring a waterproof outer insulation sheath.