Electrical Load Formula:
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Definition: This calculator estimates the total electrical load of a house by summing the power consumption of individual appliances and converting to kilowatts.
Purpose: Helps homeowners and electricians determine the total electrical demand for proper circuit sizing and energy management.
The calculator uses the formula:
Where:
Explanation: Each appliance's wattage is divided by 1000 to convert to kilowatts, then all values are summed for the total load.
Details: Proper load calculation ensures electrical systems are not overloaded, prevents circuit breaker trips, and helps with energy efficiency planning.
Tips: Enter the wattage of up to three appliances. Leave fields blank for unused appliance slots. All values must be ≥ 0.
Q1: Why convert to kilowatts?
A: Kilowatts are the standard unit for household electrical load measurement and utility billing.
Q2: Where can I find appliance wattage?
A: Check appliance nameplates, manuals, or use a wattage meter. Typical values: fridge (150-400W), TV (50-200W), AC (1000-3500W).
Q3: Should I include all appliances?
A: For full load calculation, include all major appliances that might run simultaneously.
Q4: How does this relate to circuit breakers?
A: Total load should not exceed 80% of circuit capacity (e.g., 16A breaker = 1920W max continuous load).
Q5: What about power factor?
A: This calculator assumes resistive loads. For motors or inductive loads, consider power factor in detailed calculations.