Power Cable Current Capacity Estimation
I. Current Capacity Guidelines
1.5mm²: 18A | 2.5mm²: 26A | 4mm²: 32A | 6mm²: 47A | 10mm²: 66A
II. Calculation Methods
• Multiply cross-section by 5x for 1.5-10mm² cables
• 4x for 16-25mm²
• 3x for 35-50mm²
III. Installation Considerations
• 30℃ ambient temperature basis
• 20% derating for conduit installation
• 10% derating for temperatures >25℃
IV. Critical Notes
• 10-computer network requires 2.5mm² copper wire
• 3HP AC needs dedicated 2.5mm² circuit
• 90% electrical fires originate from poor connections
V. Mnemonic Formulas
• 2.5mm² ×9 | 4mm² ×8 | 6mm² ×7 | 10mm² ×6
• "Add half" for bare conductors
• "Upgrade" copper wire calculations
