Electrical Engineering

Most air conditioning [AC] units are divided up into different types or categories. For example, windows units, packaged units, ground mounted, geothermal, and yes even some solar units are starting to appear on the market. For a specific answer I would need to know the manufacturers name and the model number of your AC.

The best and easiest way to determine how many watts are in an air conditioner [or used by an AC] is to find the nameplate data from the manufacturer. For window units it is normally located on the left or right side of the unit near the grill that sticks into the house. For other types of AC units it can usually be located by just looking around. Please don't confuse BTU's and Watts. BTU's are a measure of how much cooling capacity the AC has. Watts are a measure of how much electricity the AC uses.

I believe you are interested in the wattage so here is a typical example. A 12,000 BTU window type AC typically uses about 1200 watts of electricity. If your electric utility charges .10 [10 cents] per kilowatt hour it would cost about 12 cents per hours to run the AC. There are of course all kinds of variables involved; age of the AC, how efficient the compressor and fan motors are, etc.

If you are talking about a whole house AC unit the sizes can also vary considerably and there are many variables to consider. A typical new home of about 1400 ft. sq. located in the desert southwest area of the US would have a 3 Ton AC unit or 36,000 BTU ground or packaged AC unit.

3500 watts - Central Air Conditioner

600-1440 watts - Window Unit Air Conditioner

If its sufficiently shielded, maintained and fueled, I don't see why not.

There is no neutral in a delta connection, because that is the definition of delta, a power configuration where current flows from phase hot to phase hot. The loads are A-B, B-C, and C-A.

Contrast this with star, where there is a neutral, and the loads are A-N, B-N, and C-N.

1 ohm is the resistance of anything that measures 1 volt between its ends

when 1 ampere of current flows through it.

Efficiency isn't the question. They just do different things. For example, if you look at a typical lighting circuit in a house, all the bulbs on a circuit are in parallel. They each have the same voltage across the bulbs.

If you rewired this so that the bulbs were in series then the voltage would be divided across each bulb and if one bulb burned out the others in series would get no current and would not light.

If you had two 60Watt bulbs in parallel in your house, each would draw 1/2 Amp. Add another bulb and it would draw 1/2 amp as well, for a total of three 60W bulbs drawing 1.5 amps from the power source. If the same three bulbs were in series there would be 40 Volts across each one with a current of 1/6 amps per bulb. Hence each bulb would be about 1/3 as bright as in the parallel circuit.

Every conductor (in this case, the transmission line) has a finite resistance. so for example let us say it has a resistance of 1 ohm over a distance of 1 km. then, if the current through the conductor is say 100 Amperes, you will have a voltage drop of 100 volts across a length of 1 km.

So, a line carrying 100 Amps at 25 kV will have an effective voltage of 24.9 kV

Switchgears control electricity. They consist of switches, fuses, and circuit breakers which can be used to disconnect machines from electrical currents. This may be necessary if one wishes to fix a device without risking electrocution.

The purpose of an ammeter is to sense and display the magnitude of the current

flowing through it. When connected in series with a branch of an electrical circuit,

the meter displays the magnitude (and direction) of the current in that path ... which

you can't otherwise tell just by looking at the circuit.

Brushes transfer electricity to the commutator which is connected to the winding on the armature. The brushes and commutator form a electrical connection that is good when the brushes are stationary and the commutator is spinning. The commutator on a DC motor is sectioned to power different windings at different times, creating moving field necessairy to pull the armature off a direct current.

the High voltage rated diodes are power diodes while of low rating or normal voltage rating are considered to as ordinary / normal diode

Sine waves are a pure frequency, and hence are very stable, when passing through an analog circuit, they will keep their shape but may have their amplitude reduced. In comparison, a square wave has many frequency components, each of which may react differently to a circuit, resulting in a distorted waveform.

Power= current*voltage

First convert 250 hp into watts (about 186425 W)

Divide power that by the voltage, and you get about 388.38 amps.

You may want to double check my unit conversions.

Ohms law is V=I X R. If resistance (R) is reduced and current (I) is constant, then voltage (V) must decrease. You can see from the equation that they are proportional to one another. If, however, R is reduced and V is held constant, then I must increase (I and R are inversely proportional). The only way V can increase is if either or both I and R increase.

Various flammable gasses, flammable liquids, and combustible dusts can ALL explode when mixed with sufficent air, and an electrical spark creates enough heat to ignite the mixture. Examples would include hydrogen, propane, gasoline, alcohol, powdered sugar and flour.

One old trick to solder two wires is to twist them together and twist some solder round them as well, wrap them in foil and apply a lighted match.

#1

Primarily because of its lighter weight. Copper is a better conductor, but is too heavy and more expensive.

#2

Aluminium is lighter than most other metals yet still strong enough to carry its weight, so the cables do not need to be monstrously thick, and it is a fairly highly conductive material (being a metal) so power is not wasted on the transmission. It should be noted, however, that aluminum by itself is not normally used for long spans, i.e. high-voltage power transmission. It is wrapped around a steel core. The steel is used for strength, and the aluminum is used for better conductivity. Such cable is called type ACSR (short for aluminum conductor - steel reinforced).

#3

Because of its light weight. It is great at conducting a current and copper is expensive.

#4

Because of conductivity.

All of them. Electromagnetic, sound, even a water wave until it hits shore.

pogi current flow in the armature conductor

A: GOLD in a vacuum can be spread to a film steel does not have this property

Your service entrance cable could be Black, Red, White and bare cable. In a 240 V panel there would be 240V between Black and Red and 120 V between Black and White and Red and White. In the branch circuits the colors are Black, White and Bare wire. Black is Hot, White is Neutral and bare wire is earth ground and should be terminated on the ground bus in the main panel.

You need a Battery, Light Bulb, Ammeter, Switch.

There are basically 4 major differences :-

1. The windings (both primary and secondary) of an ideal transformer are

considered to have zero resistance, hence the transformer is lossless.

2. There is no leakage flux in an ideal transformer.

3. The permiability of the core material in ideal transformer is considered to be

tending to infinity and hence the current needed to set up the flux in the

transformer is negligible.

4. There is zero hysterisis and eddy current losses in an ideal transformer.