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Electrical Wiring
Ask questions here about proper wiring and electrical installation here.
4,935 Questions
How do you connect 3 phase inverter to single phase supply?
It depends on the 3 phase inverter. If it is a 3 phase input then you will first need to get a single phase to 3 phase converter to simulate a 3 phase supply, if that is what this particular inverter is intended for then you will have a label saying 230v primary with a L & N connection point, and the output will be labelled as secondary, giving you the inverted power rating.
This is a very expensive way of running machinery as the inverted power is no different in conumption to the single phase.
What minimum current will activate a ground fault circuit interrupter?
30 mAmp rating devices are commercially available.
Where would power factor capacitors be installed on a 3 phase motor?
Power factor capacitors can be installed on a three phase motor between the motor contactor and the overload heater block.
This is why electricians will always have work. Go to discuss question page.
What is the physics in electronics?
Firstly electricity is the flow of electrons.
An electric current moves in the opposite direction to that of the electrons themselves (unless i think you live in Canada... at any rate one country changed it) and as such is thought of as the 'positive' flow of electrons. So although electrons move from the negative to the positive terminal of a circuit, the current flows from the positive to the negative.
basic formula for looking at circuits:
V=I*R
V= voltage (in volts, the amount of energy that each coulomb has (Joules/coulomb))
I= current (in Amperes, basically speed of electricity(Coulombs/second))
R= resistance (in ohms, the amount of J*s/C^2, or total energy divided by coulombs squared) Electrons are orbiting charge particles around the nucleus and the number differs as shown in the periodic table. However if a potential is applied they leave said orbit and flow to the next nucleus leaving a hole behind. therefore as the electrons flow from positive to a more negative potential these HOLES flow in the opposite direction as a consequence. In the USA it is acceptable as electron flow. But the principle and result is the same if you understand it.
Single phase to three phase conveter for driving three phase motor using single phase?
This inverter is the cheapest and always available from famous vendors like ROCKWELL ,ABB, SIEMENS ,SCHNEIDER ELECTRIC....etc .
What is the voltage drop of a 240V 40 aluminum cable at 600 feet?
not enough information use a voltage drop calculator >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> Use these two calculaters....... http://www.csgnetwork.com/voltagedropcalc.html or http://www.elec-toolbox.com/calculators/voltdrop.htm Good luck. Brian...
How can you connect a 3 phase pressure cooker to a single phase supply?
The only ways this can be done is via a motor generator or a solid state inverter. These can convert single phase power to 3 phase power, however they are generally too large and expensive for home use and motor generators are extremely noisy.
In a commercial or industrial location 3 phase power is usually directly available from the power company.
Ask your local mains electricity power supply company to install a 63 Amp 3-phase supply at your site. It is not something you can buy in a shop like a battery. It is an electricity supply service that is different to a standard domestic home mains supply but is quite normal for places which use machinery such as workshops, factories, etc.
How long does it take to splice a cable?
It depends on how many wires are in the cable. The more conductors in the cable set the longer it will take to splice them.
What are some special cables required for explosion proof wiring?
One type of cable is called pyrotenax, a mineral insulated cable using magnesium oxide to separate the conductors. It has been in the market place for years and was the substitute for rigid conduit and explosion proof devices.
In Canada there is another type of cable called Teck cable. It was designed for Teck-Hughes Gold Mines in Kirkland Lake, Ontario where a heavy duty cable was needed because of the rough service that is involved in the mining industry. It is now widely used through out Canada as a general wiring cable. Manufactured in many sizes it is used from service entrances to underground direct bury installations. New Teck connectors have been designed to fit this cable allowing it to be used in explosion proof areas.
There has been resistance to use this type of cable in the US as large manufactures, by boycotting the government, to keep it out of their market place unless they are the sole distributor of the cable.
Electric fences are not connected to the ground in the circuit?
A short answer:
An electric fence is connected to the ground only when an animal or a human being touches it to complete a circuit from the fence to the ground.
A longer answer:
The wires of an electric fence are not connected directly to the ground because, if that was done, the fence would be shorted out and would not be able to do its job!
This is how an electric fence is actually hooked-up: the electric fence is connected to one side of a specially designed high voltage source and the return side of that source is connected to the ground.
Then, whenever the skin of any animal - or human - touches the wire whilst standing on the ground in bare feet, they get a high-voltage (10,000) DC electric pulse from the electric fence. The shocks are designed to be only enough to make them jump back from the fence, not to "electrocute" them so badly as to cause serious injury or death.
watts = volts X amps, so:
15A X 240V = 3600 watts
this depends on the manners you are asking this question and the type of paper you are dealing with. 'malleable' has three *definitions:
1. Capable of being shaped or formed, as by hammering or pressure: e.g. a malleable metal.
2. Easily controlled or influenced; tractable.
3. Able to adjust to changing circumstances; adaptable: the malleable mind of the pragmatist.
so then, if a paper adheres to any of the above definitions then it is malleable.
please note that malleable is mostly used in reference to metals.
*definitions, these definition are according to thefreedictionary.com.
What are the advantages of staircase wiring?
Staircase lighting puts the light exactly where your feet go. There is no shadow cast on the treads. Overhead lighting will cause shadows when your body gets between the overhead light source and the stair treads. One disadvantage is the extra cost to install this type of system.
The ability of a material to carry energy is called?
Thermal conductivity is the property that describes the ability of a material to carry energy. It is a measure of how well a material conducts heat. Materials with high thermal conductivity are good conductors of heat, while materials with low thermal conductivity are poor conductors of heat.
What is the difference between a 1N4007 diode and a 1N4007S diode what does the s do?
The difference in the 1N4007 diode and the 1N4007S diode is the voltage. The 1N4007S has a higher voltage but the meaning of the S is not listed.
Element used in light bulb filament?
That depends on the bulb, and the time frame. The first bulbs had carbon filaments. Certain bulbs used in control devices have iridium filaments. Modern grocery store incandescent bulbs have tungsten filaments.
Tungsten, because of its very high melting point.
What is difference between mAh and volt?
A milliamp-hour (mAh) is a measure of quality of a battery. It tells you how many hours the batter can provide one milliamp of current before it will die.
A volt is the unit of electric potential. AA, AAA, C, and D batteries are all 1.5 Volts. A 9 Volt is 9 Volts. Car batteries are 12 Volts.
AA's are typically rated in thousands of mAh. Cs and Ds are more, AAA and 9 Volts are typically less.
If you know the power that a device consumes [i.e. Remote, wireless game controller], you can calculate how long your batters will last in the following manner.
Time = [mAh / 1000] * [# of batteries * battery voltage] / device power
Ex:
Device is rated at 1W using 4 AA [1.5 Volt] batteries rated at 1000mAh.
Time = [ 1000mAh / 1000 ] * [4 * 1.5 Volts] / 1 W = 6 Hours
What happens if put fork in a plug?
You stand an excellent chance of receiving an electric shock and/or being electrocuted.
Can a cut electrical wire cause a fire?
If the exposed wire grounds out and a great amount of heat is produced then yes a fire could start under this condition. Remember overhead transmission wires are exposed wires but are well insulated from ground so as not to have the above scenario happen.
MFD is a long-obsolete symbol for microfarads. The modern symbol is the Greek letter, mu, followed without a gap by an upper-case F.
Why tungsten metal wire is not used in heater?
A heater does not get hot enough to benefit from the expense of using tungsten wire.
Most heaters use either wire made of an alloy called nichrome or plated ceramic heating elements.
Heaters generally operate at red or orange heat (i.e. 1409F to 1908F) and can use nichrome wire.
Lightbulbs operate at white heat (i.e. greater than 2309F) and use tungsten wire, but tungsten is hard and expensive to make into wire compared to softer metals.
