Overview
🔌
Calculators
9
🏗️
Materials
Cu / Al
⚡
Phase Support
1Φ & 3Φ
📐
Standards
IEC / BS
Calculators
📏
Cable Size by Current
Select cable cross-section from load current
I_design = I_load / (Ca × Cg × Ci) | Select cable ≥ I_design
Recommended Cable Size
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📉
Voltage Drop Calculator
Voltage drop across cable run
VD = (2 × ρ × L × I) / A [1Φ] | VD = (√3 × ρ × L × I) / A [3Φ]
Voltage Drop
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Drop %
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Receiving Voltage
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🔍
Cable Size by Voltage Drop
Min cable size to keep drop within limit
A = (ρ × mult × L × I) / (VD_allowed) [mm²]
Calc. Area
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Std. Size
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Actual Drop
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🔗
Cable Resistance & Impedance
R, X, Z per metre & total
R = ρ × L / A | Z = √(R² + X²) [Ω]
R/m (mΩ)
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Total R (Ω)
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Total X (Ω)
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Total Z (Ω)
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⚡
Cable Ampacity (Current Capacity)
Rated current capacity with derating
I_rated = I_base × Ca × Cg × Ci [Derating Factors]
Base Rating
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Temp Factor
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Group Factor
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Derated Rating
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⚠️
Short Circuit Withstand
Min cable size for fault current
A = (I_sc × √t) / k [mm²] Cu: k=115 (PVC), 143 (XLPE)
Min. Area (mm²)
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Std. Cable Size
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k Factor
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🔥
Power Loss in Cable
I²R losses & energy cost
P_loss = I² × R_total [W] | Energy = P × Hours / 1000 [kWh]
Power Loss
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Loss %
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Daily Cost
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Monthly Cost
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🏗️
Conduit Size Calculator
Conduit size for cable bundles
Fill Ratio ≤ 40% (multi-cable) or 53% (single) | A_conduit ≥ ΣA_cable / fill
Total Cable Area
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Min. Conduit Ø
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Std. Conduit Size
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📋
Cable All-in-One Summary
Complete cable sizing: Current capacity + Voltage drop + Power loss + Conduit — all in one
Complete cable check: Size → Ampacity → VDrop% → Power Loss → Conduit recommendation
Load Current
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Cable Size (Current)
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Cable Size (VDrop)
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Final Recommended
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Voltage Drop
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Drop %
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Power Loss
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Conduit Size
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