1. What is Residential Electric Load Calculation?

Definition: This calculator estimates the total electric load in kilowatts (kW) based on the sum of individual appliance loads in watts.

Purpose: It helps homeowners and electricians determine the total electrical demand for proper circuit sizing and service panel capacity.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( P_{kW} \) — Total load in kilowatts
• \( \sum P_{load} \) — Sum of all appliance loads in watts

Explanation: The calculator sums all appliance loads in watts and converts to kilowatts by dividing by 1000.

3. Importance of Load Calculation

Details: Proper load calculation ensures electrical systems are not overloaded, prevents circuit breaker trips, and maintains safety standards.

4. Using the Calculator

Tips: Enter the wattage of each appliance (minimum one required). Typical appliance wattages:

• Refrigerator: 150-400 watts
• Microwave: 600-1200 watts
• LED TV: 30-100 watts

5. Frequently Asked Questions (FAQ)

Q1: Why convert watts to kilowatts?
A: Utility companies typically measure and bill in kilowatt-hours (kWh), and electrical service capacity is rated in kW.

Q2: Should I include all appliances?
A: Include all major appliances that might operate simultaneously for accurate load assessment.

Q3: What about startup surges?
A: This calculator shows running watts. Some appliances (like AC units) have higher startup surges not reflected here.

Q4: How do I find appliance wattage?
A: Check the appliance label, manual, or use a wattage meter. Some appliances list amps and volts (watts = amps × volts).

Q5: What's a typical residential load?
A: Average homes use 1-3 kW continuously, with peaks up to 10-20 kW when multiple high-power appliances run simultaneously.