Electrical Load Calculator
Calculate total connected load, maximum demand, and electrical sizing requirements. Recommends main breaker size, cable sizing, and transformer capacity.
Demand factor: 0.6x
Estimated at 180W per outlet with 30% diversity
Leave blank for default: 2000W
Leave blank for default: 2500W
Connected Load
16.6 kW
Max Demand
7.7 kW
Main Breaker
50A
Connected Load
16.6 kW
Maximum Demand
7.7 kW
(9.1 kVA)
Notes:
- Maximum demand includes diversity factors per appliance type
- Main breaker sized at 80% loading capacity
- Cable sizing based on current carrying capacity
- Transformer recommended when demand exceeds 50 kVA
- Power factor assumed at 0.85 for kVA calculation
DISCLAIMER
This calculator provides ESTIMATES for preliminary planning purposes. Results are based on standard assumptions and may not reflect your specific project conditions.
By using this tool, you acknowledge that:
1. All calculations are approximate and based on typical industry standards and assumptions.
About This Calculator
This Electrical Load Calculator helps MEP engineers estimate building electrical requirements per IEC and local utility standards. Calculate total connected load, apply demand factors for different load types, determine maximum demand, and size main electrical distribution equipment. Essential for coordinating with DEWA, ADDC, SEWA, and other Gulf utility providers during building permit applications.
When to Use This Calculator
- Calculating electrical loads for new building designs
- Sizing main switchboards and distribution boards
- Determining transformer capacity requirements
- Preparing load schedules for utility applications
- Verifying electrical capacity for building additions
How to Use This Calculator
Enter connected loads
Input lighting, power, HVAC, and equipment loads in kW or kVA
Apply demand factors
Select appropriate demand factors based on load type and codes
Calculate maximum demand
Tool computes total maximum demand with diversity
Size main equipment
Get recommended main breaker, cable, and transformer sizes
Review load schedule
Export formatted load schedule for utility submission
Typical Scenarios in UAE & Gulf Projects
30-floor commercial tower with 500kW lighting, 800kW small power, 2000kW HVAC, and 300kW lifts. Calculator applies demand factors (0.9 lighting, 0.6 power, 0.85 HVAC) yielding 2,650kVA maximum demand at 0.85 PF. Recommends 2x1600kVA transformers with 30% future capacity.
20-villa residential compound, each villa with 65kW connected load. Using ADDC residential demand factors (0.4-0.6), calculator determines 800kVA compound transformer plus individual villa DBs at 100A each. Includes EV charger provisions per Estidama requirements.
Frequently Asked Questions
Take Your Calculations Further
This calculator reflects the logic built into Arkan's construction management platform.
Last Updated: January 2026
Standards Reference: IEC 60364, DEWA/ADDC/SEWA Regulations, BS 7671