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Electrical Wiring

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I would help out the elderly and I know many others that would. The question is whether the 'problems' are actually problems, i.e. safety / fire hazards, or normal electrical work. I don't think anyone will do normal work for free, but fire hazards and life safety issues should be taken care of. I'm…
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There is no requirement to replace old wiring unless new changes are being done to an old circuit that does not meet current code, in this case all the old wiring in that circuit must be replaced. It is entirely up to you if you want to replace old wiring or leave it as is (even if it looks unsafe)…
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Use a voltmeter and an ammeter to measure the supply voltage and load current; the product of these two readings will give you the apparent power in volt amperes. Use a wattmeter to measure the true power of the load, in watts. Divide the true power by the apparent power, and this will give you the …
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US Single-pole switch In the US, the standard "single-pole" light switch is single-pole single-throw, with only 2 terminals. In the ON position it connects the two terminals, and in the OFF position it doesn't.The standard US "3-way" light switch (used for switching a light from two different switc…
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The definition of the ampere is : 'that constant current that, if maintained in two straight parallel conductors of infinite length and negligible cross-sectional area and placed one metre apart in a vacuum, would produce between them a force equal to 2 pi x 10^-7 newtons per unit length'.
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The short answer is "no". A 100A panel will be protected by a 100A or smaller main circuit breaker or fuse, and if the sum of all the loads on the various branches exceeds the main breaker rating, it will trip and power will be disconnected long before any damage can occur to the panel. for USA, C…
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for USA, Canada and countries running a 60 Hz power supply service.It is important that you should read see the answer to the Related Question shown below.<><><>It won't run, there is insufficient start up voltage. It's all in the way the windings in the motor are connected. Since …
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s for USA, Canada and countries using similar 60Hz mains supplies Conversion Dangerous and NOT RecommendedUmmm no. If you did try to do it, you'd have a pretty good chance of burning your house down.More Information:I want to say "no" you can't do this based on what you've told me.What matters he…
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Answer I believe it has to do with the windings in the motor. When wired to 120V, half the motor has a positive polarity and the other half has a negative polarity. Then as the current alternates (60 hertz AC) the polarity flips, the magnetic poles oppose each other and cause the motor to spin. …
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for USA, Canada and countries running a 60 Hz supply service. Well, yes, and no. You CAN'T just disconnect the wires from the 60 amp outlet and connect them to three 20 amp outlets. It would be more like tearing out and rebuilding than converting. The 240 volt outlet has a hot wire from each side of…
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Note "2-phase" to describe US residential service is depricated nomenclature. US residential service is single phase because the two hot supply phases have 0 degrees of separation between their phases: therefore they are in phase. The two phases are pulled from 2 out of 3 corners on a 240v (line-to…
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for USA, Canada and countries running a 60 Hz supply service.The red wire is hot. Connect your blue and black wires to it. Connect your white to white on your fan. Connect the bare wire to the ground screw on your box in the ceiling. SWITCH OFF THE POWER AT THE CIRCUIT BREAKER FIRST!<><>…
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%DETAILS% No. This can lead to dangerous results. First, it violates electrical codes to use higher than standard US voltage for portable appliances. There is a much greater risk of fire because the appliances will not be protected by the types and ratings of circuit breakers typical in Europe. …
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It varies based on the ballast. Most ballasts nowadays are "power factor corrected" to try and compensate for the bad powerfactor in switching power supplies. The actual power factor of a individual fixture is entirely dependent on the circuit of the ballast, which changes from design to design.
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for USA, Canada and countries running a 60 Hz power service. A service drop to a home is done with wire that is called triplex. This means that there are three wires twisted together that go from the service pole to the mast head on your home. This is called a three wire system. There are 2 hot legs…
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for USA, Canada and countries using similar 60Hz mains suppliesUsing W=V*A, you can figure 120volts*15amps = 1800 watts. Typically you want to use around 80 percent of your capacity, so you are left with 1440 watts.You'd have to check the listing on your fan, but assume it uses around 400 watts at t…
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You will need an electrician. No. That dryer draws a maximum of 7200 Watts. The regular 120V outlets around your home can supply 1800W. So any type of converter will not work. If you have an electric range, the outlet for that is the only outlet in the apartment big enough for this. You can mak…
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for USA, Canada and countries running a 60 Hz power supply service. The NEC specifies the NECA-1 standard for general practices. NECA-1 lists typical mounting heights of different devices. This specification is not currently enforceable, but if you want standard heights, here you go: Wall Switches…
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You will need an electrician.   Tim is probably right in that unless you are knowledgable, call an electrican. Saying that, if you are knowledgable, you must install a GFCI circuit outdoors. This can be tied into an existing circuit if that circuit has no more than 9 existing lights & plu…
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NO! The circuit is being overloaded. Danger of fire will result from just changing the size of the fuse or breaker.   A 30 amp breaker may be used with #10 wiring. #10 is rated for 30 amps. I would be hesitant to do this if the tripping problem is something new though.
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It sounds like a loose connection. If it is all lights then look in main panel. If just some lights look at the switch first for loose connections. There is a good chance that the neutral from the service entrance cable to the panel is loose. BE VERY CAREFUL WHEN WORKING IN THE PANEL. Even when the …
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you could possibly design a fix for it but it would be a lot of trouble. the American dryer has internal components that run off 110v and that 110v is available from the three wire 220v circuit in the typical usa residence. this is because of the third wire, the neutral. the Korean 220 would be 2 wi…
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Yes, with a caveat. The 50A wire and plug is more than heavy enough for the dryer, so there is no problem there.The possible problem is that the dryer is designed to be protected by a 30A breaker. In the event of failure in the dryer, the breaker may not trip as it is oversized. The best solution? G…
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No. The receptacle, wiring, and breaker ratings should all be matched properly. Replacing the 50A receptacle with a 30A receptacle isn't a problem, since the wire should be rated at least 50A. But a 30A receptacle should be protected with a 30A double pole breaker. The breaker only costs about $8.…
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Three-phase motors will run on single-phase power. What they WON'T do is start. There is no easy way to re-wire such a large motor to run on a single phase. Properly sized capacitors and a special relay is sometimes used on sewage lift stations (poopie stations is what we call them) to run the 3-ph…
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The physical internal windings between single phase and three phase motors makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On t…
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for USA, Canada and countries running a 60 Hz supply service.No, the electrical code stipulates that conductor sizes #3 and smaller can not be paralleled. Conductor sizes #2 and larger can be paralled.<><><>You can, if you want to burn the house down 30 minutes after the range ki…
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For USA, Canada and countries running a 60 Hz supply service. It is best to install a new 120 volt branch circuit for the gas stove using properly sized cable and breaker and the correct type of GFCI-protected 120 volt socket outlet for use in a kitchen area. <><><> As the existi…
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Bare wires!?!?!?! For 240V you need 3 wires plus ground. Red and Black are hot, white is neutral. Don't mess with 240V if you have no idea what you're doing. It's not safe at all.
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for countries in Europe and other world areas running a 50 Hz supply service. UK household AC power mains voltage is now 230V (previously it was 240V) 50 Hz. From a 415 volt 3-phase incoming supply you will get this voltage between any ONE line and the Neutral. Between any two lines you will get 4…
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for USA, Canada and countries running a 60 Hz power supply service.Running single conductor wire with two-wire cable for a three-way switch is illegal. (LIFE SAFETY WARNING! [disclaimer] Electricity is dangerous! You can be injured or killed! Improper installations can cause fire, injury and deat…
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The answer given below refers only to USA, Canada and other countries using the same type of 60 Hz, 240 Volts "balanced around ground" system for standard mains power supplies to homes, offices, etc. Basically, it comes down to reducing the amount of lost power due to resistance of the wires in the …
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Use a 3 pole breaker. The the wire size depends on motor amperage (or mca, which is minimum circuit ampacity). Normally in a house (dry conditions) use Lumex. <><><> As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed elec…
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Answer for USA, Canada and countries running a 60 Hz power supply service. Not exactly. Breakers trip because the current exceeds the rating of that breaker. In other words....you're plugging too much into that circuit. And the wire can only safely handle a certain amount of current; so you c…
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Answer for USA, Canada and countries using similar 60Hz household electricity supplie Ok, lets assume that these are not newly installed lights or lights added to this already existing circuit first what type of lights are they? the reason I asked is because if they are fluorescent lights it coul…
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If you're asking about the electrical socket outlet itself, usually two screws fix it into its wall outlet box. There are several ways to mount an electrical outlet box. Depending where you live, just go to your local Home Depot, B&Q, Homebase, Wickes or any similar hardware or DIY-supplie…
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The information you need needs a wiring diagram! The Related Links have diagrams and the answers to the Related Questions shown below should also be of some help to you. <><><> As always, if you are in doubt about what to do, the best advice anyone should give you is to call a l…
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You are missing a very serious safety issue! There MUST be a mechanical method to keep the main breaker in the home panel in the off position while the generator "back feed" breaker is on and vice versa. For some of the newer panels, the manufacturers may make them or you can get these things on…
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Answer Here is a simplified answer that applies to older doorbells that were hard-wired in your home. If you open the housing, you'll notice a transformer that steps the line voltage of your home (120VAC) down to 12 volts. Below the transformer is a wire loop to the button outside, and at the en…
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Answer In 120/208V 3 phase system you have 5 wires: three hots, one neutral, and one ground. You have 208V between any two hots and 120V between any hot and neutral. The neutral is the same as in a single phase system. Clarification: Only 4 wires maximum come from the pole - 3 phases and a neut…
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Answer for trained people: There is one mistake that a knowledgeable person can make, and wonder why it doesn't work. This happens in some breaker boxes if you place a skinny 240 volt breaker filling an odd location (counting down vertically) and the next even position below that. When this happens…
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Each equipment has electrical specifications; for example most laptop chargers are rated to handle 110V to 240V at either 50-60Hz. In other words; the charger can be plugged into either 110V or 240V and it will adjust automatically and keeps the output at the voltage the computer requires. Some des…
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You wouldn't want to. The Watts are the reason why. If you needed to power 2000 watts worth of appliances and you have a 120v system, you'd need a little under 17 amps to do it. A relatively thin 12-gauge wire will handle that much power. To power the same load with 12v current, you need 170 amps--a…
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The simplest answer is that the electric utility uses a transformer across 2 of the 3 hot leads to develop a single hot lead with an earth reference. What follows below is frequently edited by both amateurs and professionals, with mixed results. Wikipedia is a better source of more detailed informat…
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Answers for USA, Canada and countries using similar 60Hz mains supplies Yes in some localities (towns/states) you may be allowed to convert the stove to a three wire plug, but you must first check with the local electrical safety inspector for your town to find out if this work would be legal…
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Answers for USA, Canada and countries running a 60 Hz power supply service. Any such attempt with a meter would just destroy the meter. Why not just find out which breaker/fuse controls the circuit and see what the breaker/fuse is rated at. Also find out what the wire size is. For a 20 AMP circui…
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Hire an electrician. Meter feeds are usually unfused. Any mistakes will cause a nasty fire, and draw the ire of the power company, the fire department, and your local house inspectors. You do not want to make a mistake on a 220V unfused line.
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for USA, Canada and other countries running a 60 Hz supply service Asking this type of question usually means you aren't ready to do this yourself. If you get any detailed "how to do it" answer here, you might attempt to do something you shouldn't be doing, and that may cost someone a shock, a home …
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Although an early form of battery may have been used in antiquity, the modern development of batteries started with the Voltaic pile, invented by the Italian physicist Alessandro Volta in 1800. The widespread use of batteries has created many environmental concerns, such as toxic metal pollution.Man…
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At DC and very low frequency AC, current flows inside the bulk of a conductor. As frequency increases, the skin effect gradually kicks in and AC current flow gets more restricted to the outside surface. At RF the AC current is completely limited to the outside surface. At microwaves the effect is so…
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Answer home depot or a electical supply store has what you need..just put it together you need your cord and your and your plugs but you would have a problem with the ground... you wouldn't have one.... very dangerous... I do this often to use the generator on my motorhome to power my house or m…
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Answer for USA, Canada and countries running a 60 Hz supply service. First of all, it's 240 Volts, not 220. Even though everybody you know calls it "220", it's really 240 Volts you need, and that's what an electrician would call it. OK, it sounds like you can't figure out if your dryer is faulty or…
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Answers for USA, Canada and countries using similar 60Hz mains supplies Assuming you are talking about house or business wiring, no, you need the third wire. (LIFE SAFETY WARNING! [disclaimer] Electricity is dangerous! You can be injured or killed! Improper installations can cause fire, injury a…
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No, The voltage will not change. The neutral is basically a ground and is used in conjunction with the phases to create another voltage and act as the return line in an electrical system. "Depending on the system that you have". If you have a 480 volt and used a neutral with it you would have 240 or…
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You can buy dimmable compact fluorescent bulbs at virtually any hardware store these days. Just make sure that the package says that they're dimmable. They're quite a bit more expensive than either standard incandescents or regular compact fluorescents, but they'll save you money over the standard …
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Unfortunately, this is probably not practical. Though electric clothes dryers are made as wholly 240 volt 50Hz units - for use in Europe, Asia and elsewhere in the world - all the residential dryers I have been exposed to in the US are hybrid 120/240 volt units. By this I mean that, though the hea…
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Homes are single phase. You can have 220VAC in a home, although not all homes have 220VAC. In the United States and Canada, the 240VAC is "center-tapped_ to provide 2 120 Volt halves. It doesn't matter which half is used on a 120 volt line, just so long as the house is APPROXIMATELY balanced between…
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Answer for USA, Canada and countries running a 60 Hz power supply service. The difference is the difference in the size of service entrance conductor and maximum ampacity of the service equipment [panel]. The panel will be labeled and the main breaker, if there is one, will say 100 on the operat…
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Answer for USA, Canada and countries using similar 60Hz mains supplies By asking this question you are probably not quite ready to take on this particular task. The correct answer to your question will depend on the exact locations of the desired GFCI-protected socket outlets. <><&g…
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Answer for USA, Canada and countries running a 60 Hz power supply service. The most likely cause for a loadcenter [circuit breaker box] to hum loudly when a high capacity load is connected is that there is a loose connection. This could be a loose fitting breaker, bad internal contact in a break…
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Answer for USA, Canada and countries running a 60 Hz power supply service. NO! <><><> (LIFE SAFETY WARNING! [disclaimer] Electricity is dangerous! You can be injured or killed! Improper installations can cause fire, injury and death! Should you be doing this yourse…
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Many electrical and electronic devices use electromagnets, including telephones, sound speakers, maglev trains, junkyard cranes, and doorbells.Electric motors create an electromagnetic field around a permanent magnet, as do the generators used to create electric power.
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Answer Uncirculated examples sell for $1 to $2. In any lower condition a dealer may give 5 or 10 cents. He already has rolls of them that he can't sell.
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for USA, Canada and countries using similar 60Hz mains supplies Checking a dryer outlet for power... The point of the change they made from 3 to 4 wires is to keep the ground separate from the neutral. When you don't know how something is wired, use a test meter CAREFULLY AND SAFELY to measure the…
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Answer for USA, Canada and countries running a 60 Hz power supply service. In general the answer has to be: "Not if it has been designed and wired to run only on the 50 Hz mains frequency system that is used in Singapore, Europe and elsewhere." The mains frequency in 230 Volt areas is 50 Hz (Cyc…
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Answer It will operate assuming you have a 120/208V 3 phase system, but it will not get as hot as it would on a 240V system. To wire it just use 2 hots instead of 3 and connect the neutral.
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for USA, Canada and other countries running a 60 Hz supply service.Some appliances, especially older ones, don't have a ground wire. Also, a lot of wiring circuits in older houses were installed without using a ground wire to each socket outlet. They just ran a hot and a neutral wire. The neutral …
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Answer Yes. GFCI receptacles do not rely on a ground conductor to work. They sense any difference between current flowing in the hot wire and current returning in the neutral wire. Under normal circumstances, these two currents will be exactly the same. If there is a difference, then some of the…
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I'm a licensed electrical contractor in California i can fix it if your in California.
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Answers ONLY for USA, Canada and countries using similar 60Hz mains supplies You are not allowed to change a four-wire outlet to a three wire outlet. You can change a four wire cord to a three wire cord. That is VERY different! <><><> I have answered this question at…
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Call an electrician. Doing your own electrical work can be dangerous without proper training. <><><> For more information please see the answers to the Related Questions shown below.
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For USA, Canada and other countries running a 60 Hz supply service.In a single family dwelling voltage drop calculations are not needed for the appliances as the distances are short. A maximum distance of 130 feet can be utilized and the voltage drop will still be under 3% using a #8 AWG copper cond…
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Reason for Clicking Noise Spiders like nice warm and damp places to make their nests - so a bathroom light fixture is one of their favourite places - and they don't seem to care if one of the places they use to fix one of their webs or a nest is a pair of live and neutral electrical terminals! I…
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In Germany or, as a matter of fact, in Europe, the colors for the mains wires are as follows: Live (L): Brown (and also red on old wiring circuits in UK and Eire) or black, but black is not very common) Neutral (N): Blue (and also black on old wiring circuits in UK and Eire) Earth is Yellow and G…
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The duties of an electrician are to work in commercial industrial or residential settings. They usually install, repair, and maintain electrical systems.  A general electrician should be able to run conduit of all types, figure loads and wire sizes. Read blueprints and deduct the proper needs …
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Follow directions! (LIFE SAFETY WARNING! Electricity is dangerous! You can be injured or killed! Improper installations can cause fire, injury and death! Should you be doing this yourself?) Always follow the manufacturer's instructions included with the GFCI device. <><><>…
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The "TEST" button is there for you to check the GFCI is operating correctly. When you test the GFCI using its Test button it should trip to break the circuit. Then anything connected to that circuit will have no power. It sounds like the light in the other room is wired to the same circuit as the o…
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Answer for USA, Canada and countries running a 60 Hz power supply service. There are no double-pole 120 volt switches You may be mistaking a four-way switch for a double pole. This device won't perform to serve your application. <><><> As always, if you are in doubt about w…
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For sine waves: To calculate the RMS value of a sine wave, multiply the peak value by 0.707. The peak value is, of course, one half the peak-to-peak value. To go the other way, reverse the order of operations. That is, if you're starting with an RMS value, divide by 0.707 and then multiply by two to…
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You will still have 240V going to the element itself it just won't be causing the element to heat up. Make sure the dryer is unplugged, take the back off the dryer and pull the element out. It's usually just a few screws. Mark and write down what wire goes where. The wires have clips that will slide…
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Phase shifting transformer is like a auto transformer, but has complex turns ratio. Hence along with changing voltage levels, it changes the angle of voltage.
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In a three phase system, power P = U * I * sqrt(3) * cos(phi), where U is the voltage (rms), I the amperage (rms), sqrt(3) is the square root of three, and cos(phi) is cosine of phi, where phi is the angle between U and I. For pure resistive load, phi is zero (i.e. cos(phi) = 1), making the calcula…
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Core loss is also called "No-Load" loss. To measure the core lose simply you need variable AC supply, Wattmeters, Ampere meters and Voltmeters. The basic principle to perform this measurement is to supply the transformer with its nominal voltage and then record the Watt or Kilo watt values. You will…
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Yes. Depending on who does the work it could be less expensive than getting a different air conditioner. The compressor will also need a capacitor and some rewiring. The old unit could have a 3 phase blower motor also which could run the price up even more. Although the changes can be made, the w…
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Up to the 1800's the only way that people could communicate with other people over long distances was to physically carry it: either by walking or by using horses, ships, etc. So news traveled very slowly. It was the discovery of electricity which gave Samuel Morse the idea of inventing the telegra…
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The colour phasing of a three phase electrical bus differ in different countries. In Canada the colour coding is A = Red, B = Black, C = Blue.
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Answer Take all phases into account. Voltage is measured between two phases of the three phases at one time, so what this means is this...first you read voltage between line 1 and line 2...then you read voltage between line 2 and line 3...and then from line 1 to line 3. Each phase of a 3 phase syste…
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You may have a bad switch with contacts that are very close together, which may inadvertently touch each other, closing the circuit and turning the fan on. Calling an electrician may be in order. He or she will be able to trouble shoot the exact cause and fix it safely.
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When you build up electrical charges on the surface of an object you get static. Static can result in a small shock if the electrical charge is given a direct conductive contact to the ground.
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A clockwise motor runs clockwise because of the way it is made. It is designed to run clockwise because the designer has an application that calls for clockwise rotation. A counter-clockwise motor runs the other way, again because of the way it is made. Many electric motors are reversible. If yo…
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Electricity can be a simple as charge movement. That's a basic definition, and it can be expanded from there. But in its essential form, anything that can generate a voltage can "cause electricity" as a result. Let's look at things that generate a voltage. Triboelectric effect, a form of contact el…
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This is done in order to minimize power losses in the power distribution network due to the resistance of the transmitting cables. It should be noted that for a given cable resistance, voltage drop, and thus power dissipated in the cable and not available to use, is directly related to the current f…
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There are many factors that determine what the leakage current will be. You could find out what the insulation winding resistance of the new motor should be and use the 660 volts and Ohm's law to calculate the current. If you measure this using a DC insulation tester however it probably will not yie…
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If you have to ask ... You are unqualified to do. This is not a simple wiring problem. 3 phase is industrial power and should be handled by someone licenced. There are dozens of reasons why. Answer Hi I think we need more info on what you are trying to do. 3 phase to 3 phase up or down, or 3 …
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Really, you cannot do this. Either get three phase power, buy another motor, or you'll have to invest in a motor-generator set, likely more expensive than a different motor.-Denny, TorontoI disagree, Temco makes a phase converterhttp://www.phaseconverter.com/Mike VYou can also build your own with a …
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There is no such thing as 'voltage between phases'. The voltage you are referring to is the voltage between LINES -which is why it is called a 'line voltage'! That depends on the type, voltage, and phasing of the system in question. Residential single phase service in the US is 220V between the tw…
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If you need to ask this question DO NOT TOUCH ANY WIRES and CALL IN A LICENSED ELECTRICIAN TO REPLACE THE WIRING AS SOON AS POSSIBLE! You would not be asking this question if: a) you knew how to use an appropriate instrument to measure the voltage of a wire; b) you were aware of the real dangers …
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