Electrical Panel Design Assistant – Load, Cable & Breaker Calculator

⚡ Panel Design Assistant

Professional Electrical Panel Planning & Sizing Tool

1

Load Type

2

Load Details

3

Results

🎯 Select Load Type

Choose the type of electrical load for your panel design

Motor Load
Pumps, compressors, conveyors

Lighting Load
LED, fluorescent, industrial lighting

Mixed Load
Combination of motor and lighting

Please select a load type

⚙️ Load Details

Enter the electrical parameters for accurate calculations

Supply Type Single Phase Three Phase

System Voltage 230 V 400 V 415 V

Load Power

kW HP

Please enter a valid power value

Power Factor

Efficiency (%)

Diversity Factor (Optional) Leave blank for automatic calculation

Motor Starting Method

DOL - Direct On Line

Star-Delta

Soft Starter

VFD - Variable Frequency Drive

Starting Current Multiplier Auto-set based on starting method (DOL=6, Star-Delta=3, Soft Starter=3, VFD=1.5)

Lighting Type

LED

Fluorescent

Mixed

📊 Calculation Results

📐 Formulas Used

Full Load Current (A):
Three Phase: I = P × 1000 / (√3 × V × PF × η)
Single Phase: I = P × 1000 / (V × PF × η)

Breaker Rating (A):
I_breaker = I_load × 1.25

PF Correction (kVAr):
Q = P × (tan(acos(PF_existing)) - tan(acos(PF_target)))

kVA Sizing:
kVA = P / PF × (1 + Margin)

⚡ Practical Notes

✓ Always verify: Check manufacturer datasheets for actual equipment specifications before final design.

✓ Motor starting: Starting current significantly affects breaker and generator sizing. Consider voltage drop during starting.

✓ Cable sizing: Results based on standard current ratings. Consider derating factors for ambient temperature, grouping, and installation method.

⚠️ Code compliance: Final design must comply with local electrical codes (NEC, IEC, BS, etc.) and regulations.

⚠️ Professional review: This tool provides preliminary calculations. Always have a qualified electrical engineer review final designs.