1. What is Residential Service Panel Load?

The Residential Service Panel Load calculation estimates the total electrical load required for a home based on its square footage and major appliances. This helps determine the appropriate size for the electrical service panel.

2. How Does the Calculator Work?

The calculator uses the standard residential panel load equation:

Where:

• \( Sq Ft \) — Total living area in square feet
• \( 3 \) — Standard multiplier for general lighting and receptacle loads (VA per sq ft)
• \( Appliances \) — Total load from major appliances in volt-amperes (VA)

Explanation: The equation accounts for base electrical needs (3 VA per sq ft) plus additional loads from major appliances.

3. Importance of Panel Load Calculation

Details: Proper panel sizing is crucial for electrical safety, preventing overloads, and ensuring adequate capacity for all home electrical needs.

4. Using the Calculator

Tips: Enter accurate square footage of living space and sum the VA ratings of all major appliances (HVAC, water heater, range, etc.).

5. Frequently Asked Questions (FAQ)

Q1: Why use 3 VA per square foot?
A: This is the standard value from the National Electrical Code for general lighting and receptacle loads in dwellings.

Q2: What's included in appliance load?
A: Include all fixed appliances - HVAC systems, water heater, range, oven, dishwasher, garbage disposal, etc.

Q3: How does this relate to service size?
A: The total load helps determine if a 100A, 150A, or 200A service is needed, though other factors may apply.

Q4: Should I include all electrical devices?
A: No, the 3 VA/sq ft covers general use items. Only include major fixed appliances in the appliance load.

Q5: What about future expansion?
A: Many electricians recommend adding 20-25% to the calculated load for future needs when sizing the panel.