why is the voltage supplied by the central electricity board usually a factor of 11,eg 110v,220v ?
85692
They aren't always a factor of 11, just the electrical systems in residences are the range you stated but there are 480v, 208, etc.  It isn't for any particular reason that i know of although i'm sure when they adopted the system they had their reasoning, but it has nothing to do with the number of 11.  Just the reason they use 120/240 is that you can just use a 2 box circuit breaker to get your 240 without requiring a transformer (expensive) and NEC requirements for that one that would make the cost much more expensive
774823
There are way more than three factors to consider.  The top three might be voltage, current and accessibility.  See the following link for more in-depth info.
186909
I think the question is to the shape, size, position of the Plugs are different countries.\nInterestingly though the Live-Neutral-Ground concept is the same in all countries.\n\nIm researching on that.. Shall update my answer soon...\n\nUpdate:\nGot it!!! Check out the URL. Its the governments and the industry of each local government which had caused these different plug shapes and standards..
73359
Intially it was ignorance , then it became a matter of convenience...The terminologies did not change..people still refer to it as AC voltage and DC voltage..just like People refer to siemens as mho in some places..It just became a standard term
333276
This is a little too complex a question for free answers.  But:\n\nLower NUMBERS in gauge correspond to larger AREA of the wire cross section.  The larger the area, the more amerage can be safely carried by the wire.  Voltage is not really an issue at common household voltages, as most modern wire is rated to 600V and household doesn't exceed 220V.\n\nIn-wall wiring is solid copper.  You will generally match the wire gauge to the circuit breaker size as follows:\n\n14 gauge = 15 amp breaker (15 amp max)\n12 gauge = 20 amp breaker\n10 gauge = 30 amp breaker\n\nThe use of watts is misleading; it's AMPS that matter.  But watts * volts = amps, so you can deduce amerage from reading the wattage value, and knowing the current in your home.  The in-wall wiring specs are not generally limited by wire LENGTH, at least not in the way extension cords are.\n\nExtension cords, unlike in-wall wire, are not solid copper.   However, they're also less likely to burn down your house.  They are rated by wire lngth and gauge.\n\nYou can use the links I've provided here to see required gauge sizes.  Most indoor space heaters are 1500 watts (about 12 amps) though  some are 1750 amps.
1082346
The "60 each" part of your question says you don't understand the most basic aspects of electricity.  Voltage is a measurement between two points.  Think of a 12V car battery.  It is 12 volts between the 2 terminals of the battery.  Another analogy:  two things that are 3 feet apart are 3 feet apart, not 1.5 feet each.\n\nDoubling 120 is 240, not 220, but I 220 is a commonly used number, like 110 for 120, but the standard voltages are 120 and 240.\n\nI think the point about doubling when you lose a neutral is talking about what is called a multiwire circuit.  The service into your house is the same, and some appliances like your dryer, have the same thing.  For a single phase case, a multiwire circuit has 2 phase (or hot) conductors and a neutral, with 120 volts between each phase and the neutral and 240 volts between the two phases.  This is created by a secondary winding on the utility transformer that is 240V, with a tap in the center which is grounded.  The tap is half way so it is 120V to each hot conductor.  If the neutral connection is lost, you still have 240V between the hot conductors, and all the 120V things in your house will be put in series.  For example, a couple light fixtures on 2 separate circuit breakers might be on the two opposite phases.  When the neutral is lost to the utility, there is still a connection of the neutral's of the lights, so you'll have the two lights in series and connected to 240V.  Each light will not have 240V though.  If the load on each phase were the same, removing the neutral will still leave 120V on each side.  That isn't likely, so one phase will get more than 120V (and generally cause damage) and the other phase will be less than 120V, and they will add to 240V.  It would be impossible for it to be so unbalanced that one phase would be 240V and the other would be 0.
496124
Calculate the electricity.
476704
My understanding of the 110 volt thing is it was instituted as a (bogus) safety measure in the US and Canada. 220 is better, and cheaper.
996460
you'll need an adapter...different types of electricity
901633
Distrbution board used in wiring system to decrease the voltage loss(very small). It is genrally located at the center of the house and from it connection goes to different point . I f u take at every point means from the main switch a room is there we take a tapping at that point and another one at some point, there will be lots of tapping that causes a voltage drop. About rating U search Indian Electricity rules. For this u refer to any electrical estimating  book.
729269
You will need a plug adapter and a power converter otherwise you will damage you power pack and laptop.\n\nOr the easier option is to buy a new power pack in Australia or buy one that works in Australia before you go (the compatible ones are cheaper than originals).\n\nNot only are the plugs different, but the main's current is also different.\n\nIn the US, the current running in the mains is approx 100-127v/60hz.\nIn Australia, the current running in the mains is approx 220-240v/50hz.\n\nPlease see here: http://en.wikipedia.org/wiki/Image:Map_of_the_world_coloured_by_voltage_and_frequency.png\nhttp://en.wikipedia.org/wiki/Domestic_AC_power_plugs_and_sockets
1028004
Window units run off of 110 voltage x 2 = 220 voltage. Central air runs off 220 voltage. Central air circulates much better than window units. I'd opt for central air.
2627
I could suggest several considerations.  First P=IE, that is Power equals the electrical current (I in Amperes) times the voltage (E in volts).  Current is like the flow of water in a pipe and voltage is like the pressure causing the water to flow.  If you use the water to drive a hydraulic piston (say to hoist an automobile for repair) you can use either a small piston and high pressure or a larger piston and lower pressure.  Which is more cost effective?\n\nIn the United States, electric power is delivered to neighborhoods using three wires (three phases) strung along telephone (power) poles.  Only two of the wires are led to a single residence but the neighborhood must use all three wires to balance load on the wires.  Within a house electricity passes from only one wire (phase) to ground or earth to light a lightbulb which uses 110 volts.  The clothes dryer that needs far more power is connected between two of the supply wires (two phase) and to ground to supply 220 volts.  A machine shop might connect a very large motor to all three supply wires to obtain even more power at 440 volts.\n\nSix volts or even 12 volts DC in an automobile circuit can be touched with little danger.  It is less dangerous to accidentally touch a 110 volt AC wire than a 220 volt source and 440 volts is most dangerous.\n\nTherefore, the selection of voltage depends in part on safety and then on the size of the job to be tackled and also economic factors.  The higher the required current, the larger the required wires using expensive copper.  Increasing the voltage reduces the needed current and reduces the needed copper to do a given job.  The higher the required voltage, the more expensive the required electrical insulation will be.  Engineers must determine the best trade off of many factors.
1074739
what is your question?\n\nA 220 Volt Circuit works the same as any other voltage.  Voltage pushes electrons and work is done.
152701
It goes from the substation to people's homes because of the difference in "electrical potential" which is measured in volts.  In the U.S., this difference is about 110 volts (relative to the earth or "ground").  Think of a ball rolling down a hill.  It goes from high potential (the top of the hill) to low potential (the bottom of the hill).\n\nAs to what direction it goes, it doesn't realy matter in one sense.  Electricity running through a light bulb will light it up regardless of the direction that the electrons are going.  So the power stations actually use alternating currents.  This means the levels of voltage go from high to very low (negative) several times per second (in fact it changes 60 times per second in the U.S., hence it's called 60 hertz).  So for a while the electrons flow one way, and then they flow the other.
966091
probably the fact that it is made for the usa market and the power rateing is 0nly 120volt not 240 like ours,so if u get it and plug into the mains u will burn it out so u have wasted ur money,try european markets but stress u need for uk
424895
It seperates wear the wattage is going between the two seperate rails... It is like a house wired for 240.  Some of your outlets go to one rail in the electrical panel on 120 some to the other rail of 120.  Then yet others use both rails for 240.  In the computer power supply they never really combine both rails though, just split where the end of the line goes.