⚡ Smart Cable Size Calculator
📋 Cable Usage Guide (Standard)
| Size (sq mm) | Ideal Application | Max Current (Approx) |
|---|---|---|
| 1.5 sq mm | Lighting, Fans, Internal Wiring | 14 Amps |
| 2.5 sq mm | Power Sockets, 1.0 Ton AC | 20 Amps |
| 4.0 sq mm | Geysers, 1.5 - 2.0 Ton AC | 26 Amps |
| 6.0 sq mm | Main Service Cable, Motors | 33 Amps |
| 10 - 16 sq mm | Heavy Industrial Feeder Lines | 45-60 Amps |
🔍 Calculation Formulas
1. Design Current (I):
Single Phase: I = (kW × 1000) / (V × PF)
Three Phase: I = (kW × 1000) / (1.732 × V × PF)
(Standard Power Factor assumed: 0.85)
2. Voltage Drop (VD):
VD = (Factor × ρ × L × I) / Area
ρ (Resistivity) - Cu: 0.0172 | Al: 0.0282
Single Phase: I = (kW × 1000) / (V × PF)
Three Phase: I = (kW × 1000) / (1.732 × V × PF)
(Standard Power Factor assumed: 0.85)
2. Voltage Drop (VD):
VD = (Factor × ρ × L × I) / Area
ρ (Resistivity) - Cu: 0.0172 | Al: 0.0282