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Q: What does it cost to install 10 power points in a brick wall?
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How much should it cost to install a bathroom light?

If this question said where the Asker lives someone might be able to give an answer!


What are the advantages and disadvantages of variable power supply?

A: A variable power supply has no disadvantage since it can replace a fix power supply. The disadvantage will rest with the additional cost to make one.


Cost to install 1200 Amps Circuit Breaker?

1200 Amps is a huge breaker. Typical houses might have between 100 and 200 Amp service. Since this would have to be a very unique installation you would have to provide a lot more information before cost could be computed. You also have to indicate who is supplying the breaker which would be a significant cost on its own.


How do you calculate the cost of electricity bill of a 3 phase 125kW induction motor running at 400v 50Hz motor running for 8 hrs condition if 1000w equal to Rs0.238?

To answer this question, i need the power factor of the motor.CommentYou don't need the power factor, as you already know its true power (watts), but you do need to know the efficiency of the motor to determine its input power. You also need to know the cost per kilowatt hour.But you can get a rough idea by multiplying the number of kilowatts, by the time in hours, by the cost per kilowatt hour. For a more accurate answer, you need to divide this by the efficiency of the motor.


Why there is a need of interconnection in electrical power systems?

We need these interconnections because apart from delivery, the purpose of the transmission network is to pool power plants and load centers in order to minimize the total power generation capacity and fuel cost. Transmission interconnections enable taking advantage of diversity of loads , availability of sources and fuel price in order to supply electricity to the loads at minimum cost with a required reliability.