Learn how to electrical load calculations for house using formula, example, and calculator. Includes appliance table and step-by-step guide.

1. ✅ Quick Answer

To calculate electrical load for a house:

👉 Step-by-step:

1. List all electrical appliances
2. Add total wattage
3. Convert to kW
4. Calculate current using formula

👉 Formula:

👉 I = P / (V × PF)

Where:

• I = Current (Ampere)
• P = Power (Watts)
• V = Voltage (230V)
• PF = Power Factor (0.8–0.9)

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2. 📊 Appliance Load Chart (VERY IMPORTANT)

Appliance	Power (W)
Fan	75
LED Light	20
TV	100
Refrigerator	300
AC	1500
Washing Machine	500

3. 🧠 What is Electrical Load Calculation?

Electrical load calculation is the process of estimating total power consumption of a building.

It helps to:

• Select proper cable size
• Design electrical panel
• Avoid overload

👉 Used in:

• Houses
• Apartments
• Commercial buildings

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4. 📐 Formula (Elcectrical Load Calculations Formula)

👉 Power (kW) = Total Watt / 1000

👉 Current Formula:

👉 I = P / (V × PF)

👉 This is the main load calculation formula

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5. 🧮 Step-by-Step Calculation

Step 1: List appliances

• 5 Fans = 375W
• 5 Lights = 100W
• 1 AC = 1500W
• 1 Fridge = 300W

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Step 2: Total Load

👉 Total = 2275 Watts

👉 Convert:

👉 2275 / 1000 = 2.275 kW

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Step 3: Calculate Current

👉 I = 2275 / (230 × 0.9)

👉 I ≈ 11 Amp

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Step 4: Select Cable

👉 Use 2.5 sqmm or 4 sqmm cable

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6. 📊 Electrical Load Calculations Example

🏠 House Example

• Total load = 2.3 kW

👉 Required current = ~11 A

👉 Use:

✔ MCB = 16A
✔ Cable = 2.5 sqmm

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🏢 Apartment Example

• Load = 10 kW

👉 Current:

👉 10000 / (230 × 0.9) ≈ 48 A

👉 Use:

✔ 10 sqmm cable

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7. 🏗 Diagram / Load Distribution

Main DB panel
Circuit distribution
Load flow

8. 📥 Download Electrical Load Calculator Excel

👉 Download Electrical Load Calculations Excel Sheet

Includes:

✔ Automatic load calculation
✔ Appliance input
✔ Current calculation
✔ Cable suggestion

👉 Perfect for engineers & students

9. ❓ FAQ

How to calculate electrical load?

👉 Add total wattage and apply formula:

👉 I = P / (V × PF)

How to estimate home electrical load?

👉 List appliances and sum total watt.

What is electrical load calculation?

👉 It is the total power consumption of a building.

What is load calculation formula?

👉 Power = Watt / 1000
👉 Current = P / (V × PF)

What is electrical load capacity calculator?

👉 A tool to calculate current based on load.

How to calculate electrical load of a house in India?

👉 Use 230V supply and 135 LPCD method for estimation.

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