BIJLIBEE CABLE DESIGN TOOL

Wire Size Calculator

Load current, derating, voltage drop aur short-circuit check ke saath cable size estimate karein.

Safety First: Yeh preliminary estimate hai, installation instruction nahi. Final cable, breaker, earthing aur protection qualified electrical engineer/electrician se verify karayein.

Circuit Details Bharein

Load InputLoad Power (kW)Load Current (Ampere)Available data select karein

Supply TypeThree Phase ACSingle Phase ACDC SupplyBalanced three-phase assumed

Useful Load PowerkW, motor shaft/useful load

VoltageLine voltage

Power FactorAC load only

Load EfficiencyUsed in kW mode

Design MarginPercent of load current

One-Way Cable LengthMetres

Conductor MaterialCopperAluminiumResistance and ampacity table

InsulationPVC 70 CXLPE 90 CTemperature rating

Installation MethodConduit / EnclosedCable TrayFree AirDirect BuriedSurrounded by InsulationGeneric adjustment factor

Ambient Temperature30 C35 C40 C45 C50 C55 C60 CAir-reference estimate

Grouped Loaded Circuits1 circuit2 circuits3 circuits4 circuits5 circuits6 circuits7 or moreGrouping derating

Parallel Runs per PhaseEqual length and termination assumed

Maximum Voltage DropPercent

Fault CurrentkA; zero skips fault check

Protection Clearing TimeSeconds; used only when fault current is entered

Values ya design limits check karein. Calculator table range ke andar suitable cable nahi dhoondh saka.

PRELIMINARY RECOMMENDED PHASE CONDUCTOR

4 mm2 Copper

1 run per phase | PVC | Conduit / Enclosed

All selected checks passed

Calculated Load Current17.18 A

Design Current21.48 A

Corrected Capacity22.62 A

Suggested Breaker20 A

Estimated Voltage Drop	4.24 V / 1.02%
Conductor Resistance	5.23 Ohm/km at operating temp
Estimated Cable Loss	242.00 W
Combined Derating Factor	0.870
Required Size by Ampacity	4 mm2
Required Size by Voltage Drop	1.5 mm2
Required Size by Fault Check	Skipped
Preliminary Earth Conductor	4 mm2

Wire size kaise select hota hai?

Professional cable selection mein load current ke saath ambient temperature, grouped circuits, installation method, conductor material, insulation, voltage drop aur short-circuit withstand sab dekhe jate hain. Calculator corrected cable capacity ko design current se bada rakhta hai aur standard sizes mein agla suitable option choose karta hai. Pure ghar ka load calculate karke main wiring size janne ke liye hamara Home Load Calculator use karein.

1. Load CurrentkW, phase, PF aur efficiency

2. AmpacityDerating ke baad capacity

3. Voltage DropLength aur conductor resistance

4. Fault CheckOptional adiabatic estimate

Important limitations

• Generic ampacity tables aur correction factors use kiye gaye hain; exact cable construction tables alag ho sakte hain.
• Harmonics, neutral loading, soil thermal resistivity, buried depth, solar heating, motor starting voltage drop aur termination limits separately verify karein.
• Breaker/RCD/RCBO, cable cores, armour, earthing system aur fire-rating ka final design is tool se nahi hota.

Electrical current aur load samajhne ke liye Ampere to Watt Calculator dekhein, aur ghar ka bijli bill manage karne ke liye Ghar Ka Bijli Bill Kam Karne Ke Tarike guide padhein.

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FAQs

Wire size sirf ampere se choose kar sakte hain?

Nahi. Cable length, voltage drop, temperature, grouping, installation, fault current aur cable construction bhi zaroori hain.

Copper aur aluminium cable mein kya difference hai?

Same cross-section par copper ki resistance aam taur par kam hoti hai. Aluminium termination, minimum size aur installation requirements alag ho sakte hain.

3% voltage drop hamesha rule hai?

Nahi. Acceptable limit circuit type, installation standard, source aur equipment requirements par depend karti hai. Input field mein project limit use karein.

Kya calculator ka breaker aur earth size final hai?

Nahi. Ye preliminary indication hai. Protection coordination, disconnection time, earthing system aur local code ke liye engineer se verify karayein.

Disclaimer: Cable ampacity tables manufacturer, number of cores, installation method aur standard ke hisaab se badalti hain. Is estimate par bina professional verification ke wiring purchase ya install na karein.

WRITTEN & REVIEWED BY

Satyam Kumar Yadav

Founder and Creator of BijliBee. Satyam electricity calculations, practical energy-saving tools aur simple Hinglish guides ko aam users ke liye aasan banane par kaam karte hain.