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Load Calculation Formula:
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Electrical load calculation is the process of determining the total power consumption of all electrical appliances and devices in a circuit or system. It helps ensure electrical systems are properly sized and safe.
The calculator uses the basic load calculation formula:
Where:
Explanation: This simple formula adds up the wattage of all connected appliances to determine the total electrical load on a circuit.
Details: Proper load calculation is essential for circuit design, preventing overloads, ensuring electrical safety, and complying with electrical codes and standards.
Tips: Enter the wattage of each appliance in watts. At least one appliance must be entered. Additional appliances can be added as needed for comprehensive load calculation.
Q1: Why is load calculation important?
A: It prevents circuit overloads, reduces fire hazards, ensures proper breaker sizing, and maintains electrical system reliability.
Q2: What's the difference between watts and volt-amps?
A: Watts represent real power, while volt-amps represent apparent power. For resistive loads they are equal, but for reactive loads they differ due to power factor.
Q3: How do I find appliance wattage?
A: Check appliance labels, manuals, or nameplates. Wattage is usually listed in specifications. For unknown devices, use a wattmeter.
Q4: What about continuous vs non-continuous loads?
A: Continuous loads (on 3+ hours) require 125% capacity. This calculator provides basic load - consult an electrician for detailed calculations.
Q5: When should I consult an electrician?
A: For new installations, major renovations, or if your calculated load exceeds 80% of circuit capacity, always consult a licensed electrician.