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Factories often have three phase voltage, and higher voltage (480V) compared to homes. Three phase voltage is necessary for three phase induction motors, which are often used in factories. These are very rarely used in homes. Three phase power requires more equipment than single phase (2 or three step down Transformers vs. one for single phase).
Factories use higher than home voltages so wiring can be sized down and still provide the necessary power ( P = V*I ). Higher voltage equipment naturally costs more, and homes typically do not need the amount of power that would require excessively large guage wires, so it is more economical (and safer) to run lower voltage.
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How do different currents and voltages affect the body?
the body can act as a conductor
How do you Calculate the contact rating of relay for AC and DC?
On the side of the relay there is a name plate that tells you the current carrying capacity of the contacts. It gives you the ratings at different AC voltages and a DC rating of the contacts at different voltages.
What is nonlinear resistance?
A nonlinear resistance is a resistance which is different for different voltages ie current is not proportional to voltage. An example of this is the filament of an incandescent lamp.
What are the voltages in secondary transmission electric lines?
A: Those voltages are called distribution voltages to differentiate from transmission voltages. And that varies from state to state and locals . Usually around 10kv to 20 kv
How are voltages imported into installations through the supply neutral conductor?
A 'voltage' is another name for a potential difference. As the name implies, a potential difference exists between two different points or, in the case of an electrical installation, between the line conductor and the neutral conductor. So the neutral does not 'import voltages'. Voltages exist between the line (hot) conductor and the neutral conductor.
Why can't lightning be used to provide electricity for homes?
DC (dirrect current) electricity is not used in homes, because different appliances (lamps, TVs, etc.) use different voltages. By using AC electricity, each appliance can take the voltage it needs. If we used DC, some smaller appliances would constantly burn out, because the voltages are far too high.
Where is gum manufacture?
All gum is manufactured in gum factories. Apart from that made in peoples homes. This gum is made in peoples homes, not in gum factories.
Where are people exposed to chemical?
People can be exposed to chemicals on farms, in factories, and even in homes.
How are most homes in factories in Iceland heated and powered?
geothermal energyMost homes and factories in Iceland are powered by Geothermal energy. This is power extracted from the heat stored in the earth.
When batteries come in different volts what does it mean?
It means they come in different voltages to supply power to different things that require different voltages.
Schools and factories are wired in?
are factorys schools and homes wired in series
How is coal carried to factories homes and other places?
By train or lorries.
Electricity powered homes and factories. How did electricity change Americans' lives?
Electricity powered homes and factories. It changed American lives by extending the number of hours in the day when people could work and play.
How does factories help the world today?
The factories help us because they make weapons, medicine and send gas and electricity to our homes
What is it called when soldiers destroy homes farms factories and public buildings?
APEX
What is happening with the Akosombo dam now?
it is used to power homes school and factories
How did the location of the war's battles affect the economy in the south?
By destorying homes and factories in the south
