1. What is a Home Electrical Load Calculator?

Definition: This calculator estimates the total electrical load of a home based on square footage and fixed appliances.

Purpose: It helps homeowners and electricians determine the electrical service size needed for a home.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• Load — Total electrical load in volt-amperes (VA)
• Sq Ft — Home's square footage
• 3000 — Small appliance load (VA)
• 1500 — Laundry circuit load (VA)
• Fixed Appliances — Sum of fixed appliance loads (VA)

Explanation: The calculation follows the standard method for residential load calculations per electrical codes.

3. Importance of Electrical Load Calculation

Details: Proper load calculation ensures safe electrical system design, prevents overloads, and helps determine appropriate service size.

4. Using the Calculator

Tips: Enter the home's square footage and the total VA rating of all fixed appliances (water heater, HVAC, etc.). All values must be ≥ 0.

5. Frequently Asked Questions (FAQ)

Q1: Why multiply square footage by 3?
A: This accounts for general lighting and receptacle loads at 3VA per square foot as per electrical code requirements.

Q2: What's included in the 3000VA small appliance load?
A: This covers two 20-amp small appliance branch circuits (1500VA each) required in kitchens and dining areas.

Q3: Why is there a 1500VA laundry load?
A: This accounts for the required 20-amp laundry circuit (1500VA minimum).

Q4: What counts as fixed appliances?
A: Permanent appliances like water heaters, HVAC systems, ranges, dryers, and other large fixed equipment.

Q5: Is this calculation code-compliant?
A: This follows basic NEC residential load calculation methods, but local codes may have additional requirements.