Connected Load
Connected load is the total rated wattage of appliances connected to the service. It matters for sanctioned load, wiring capacity, inverter sizing, and whether several heavy appliances can run together.
Tamil Nadu connected load estimate
TNEB Load Calculator for Home Appliances
Estimate your connected load in watts and kW, then convert appliance usage into daily and monthly electricity units. This page helps Tamil Nadu household users understand load before using the TNEB bill calculator.
- Add lights, fans, AC, fridge, pump, and other appliances
- See connected load in W and kW
- Estimate daily and monthly units from usage hours
- Use monthly units in the TNEB bill calculator
Electricity Load Calculator in kW for Home
Enter each appliance's rated wattage, quantity, and average daily usage hours. The result estimates total connected load and likely energy units, not an official sanctioned-load approval.
Your connected-load and unit estimate will appear here.
Load calculation steps
How to Use the TNEB Load Calculator
A load calculator answers a different question from a bill calculator. Load is the maximum power your appliances may draw when they run together. Units are the energy consumed over time. For Tamil Nadu homes, this distinction matters when you plan AC usage, inverter size, wiring, sanctioned load, or a possible bill increase.
Use the wattage printed on the appliance label when available. If an appliance has a range, start with the higher running wattage for a conservative planning estimate.
Step-by-Step Home Load Estimate
- List the appliances that may run in your home, especially heavy loads such as AC, water heater, pump, iron, oven, and induction stove.
- Enter the rated watts for each appliance. Use W values from the label, manual, or a realistic appliance-wattage table.
- Enter quantity and average daily usage hours. Keep hours at 0 for an appliance you want to include only in connected load.
- Calculate the load and review connected kW, daily kWh, monthly kWh, and approximate current at 230V.
- Use the monthly units in the domestic TNEB bill calculator to estimate the EB bill.
Example: AC Home Load Planning
A home with three 75 W fans, six 12 W lights, one 1.5 ton AC around 1500 W, and one refrigerator around 200 W has a connected load near 2 kW before adding pump, heater, computer, or kitchen appliances. If the AC runs five hours per day, it can add roughly 225 units per 30 days by itself.
Typical appliance wattage
Common Home Appliance Watts for Load Planning
Use these ranges as a starting point when the exact label is not visible. Actual wattage depends on model, star rating, age, compressor cycling, motor load, and usage conditions.
| Appliance | Typical running watts | Planning note |
|---|---|---|
| LED bulb or tube light | 9-25 W | Small individually, but many lights can add up in large homes. |
| Ceiling fan | 50-90 W | BLDC fans may be lower; older fans may be higher. |
| Refrigerator | 150-300 W running | Compressor cycling means units are lower than running watts times 24 hours. |
| 1 ton to 1.5 ton AC | 900-1800 W | Inverter AC power changes with room temperature and set point. |
| Water heater or geyser | 1500-3000 W | High load even when used for a short time. |
| Water pump | 370-1500 W | Motors can need extra starting current. |
| Induction stove or oven | 1200-2200 W | Kitchen appliances can dominate the connected load. |
For wiring, breaker, sanctioned-load, or safety decisions, use a qualified electrician and official TNPDCL/TANGEDCO service information instead of only an online estimate.
Connected load vs bill units
What the Load Result Means Before You Calculate the EB Bill
The load estimate helps you understand how many kW your home may draw. The monthly-unit estimate helps you forecast the EB bill. They are related but not identical.
Daily and Monthly Units
Units are kWh. A 1 kW appliance running for one hour uses one unit. Monthly units depend on usage time, compressor cycling, thermostat settings, and habits.
TNEB Bill Estimate
After you estimate monthly units, use the domestic bill calculator for Tamil Nadu slab-wise charges. The official bill may still include adjustments, arrears, taxes, and official rounding.
Planning estimate
Use the Estimate for Planning, Then Verify Safely
This TNEB load calculator is for household planning. It does not approve sanctioned load, replace electrical inspection, or guarantee wiring safety. Heavy motors, AC compressors, geysers, EV chargers, and three-phase equipment need professional checks.
Common questions
TNEB Load Calculator FAQ
What is a TNEB load calculator?
A TNEB load calculator estimates the total connected appliance load in watts and kW for a Tamil Nadu home. It also estimates units from daily usage hours so you can plan before calculating the EB bill.
Is connected load the same as electricity units?
No. Connected load is power capacity in W or kW. Units are energy in kWh. A 1000 W appliance running for one hour consumes one unit.
Can I use this result as my official sanctioned load?
No. This tool is an estimate for planning. Sanctioned load and service changes must be checked through official TNPDCL/TANGEDCO procedures and a qualified electrician.
Why does AC increase my monthly units so much?
An AC has high running wattage and often runs for several hours. A 1500 W AC running five hours daily can use about 7.5 units per day before real-world cycling adjustments.
How do I use this with the TNEB bill calculator?
Calculate monthly units here, then enter that unit estimate in the domestic TNEB bill calculator. The bill calculator applies Tamil Nadu domestic slab logic.
Does this calculator include starting current?
No. It estimates running load. Motors, pumps, compressors, and some high-load equipment can draw extra current during startup, so use professional advice for wiring and breaker decisions.