Electrical & Engineering5 min read
How Your Electricity Bill Is Calculated, Line by Line
Units × rate + fixed charge gives the base: 350 kWh at ₹7 plus ₹180 is ₹2,630 before taxes. See how slabs and duty change what you actually pay.
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- Electrical & Engineering5 min read
Electricity Cost of an Appliance: kW × Hours × Rate
A 1.5 kW heater used 4 hours a day for 30 days burns 180 kWh, about ₹1,440 at ₹8 per unit. See the method for any appliance and where it overstates.
- Electrical & Engineering4 min read
Fan and Motor Current Draw From Watts
A 75 W ceiling fan on 230 V draws about 0.36 A, while a 1 HP pump pulls roughly 5.4 A. Use I = P ÷ (V × power factor) to size wiring and breakers.
- Electrical & Engineering5 min read
How to Work Out Generator Fuel Cost
Fuel cost = litres per hour × hours run × price per litre. A set burning 3.5 L/h for 12 hours at ₹95 a litre uses 42 L and costs ₹3,990.
- Electrical & Engineering4 min read
How Long a Generator Runs on One Tank
A 25 litre tank on a 5 kVA diesel set carrying 2.4 kW lasts about 15.6 hours, not the full-load figure. See how load share changes fuel burn per hour.
- Electrical & Engineering4 min read
How to Choose the Right Inverter Size for Your Home
Add up the running watts, divide by a 0.8 power factor, add 25 percent headroom and check motor surge: 500 W of loads points to an 800 VA inverter.
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