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A 277/480V box should be clearly marked, but not always. The only way to be certain of a box's voltage is to use a voltmeter on it. This type of voltage is very dangerous. When voltages start to get this high, at best you may loose a finger or limb, at worst, you die. I recommend calling an electrician, who will be able to safely check this out.
Wiki User
∙ 14y ago
Wiki User
∙ 11y agoTo determine if the electrical panel is three phase or single phase look at the main breaker or fused disconnect. If the breaker is a two pole breaker then the panel is a single phase panel. If the main breaker is a three pole then the service is a three phase system.
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Why would a generator put out 240 volt single phase?
For a home generator, to supply voltage for devices that require 220 V or 240 V. An electric oven or clothes dryer are examples of such devices. The generator at the power plant actually generates electricity at a much higher voltage, for easier transmission (and those are 3-phase generators). Also most homes run on 240 single phase. Power is split at the breaker box. To supply 120 loads and 240 loads. 240 single phase is a common voltage.
What is a one gang switch what is a single phase circuit?
A one gang switch is like an ordinary switch box in your home. When there is more than one box, the electrical terminology used is ganging the boxes together. Two switches side by side in a single box is expressed as a two gang box. Three switches side by side in a single box is a three gang box. A single phase circuit is a circuit that gets is supply voltage from a single phase supply system. In North America the single phase supply voltages are 120/240 volts. A single phase circuit can also be supplied from any two legs of a three phase system. The most common voltages in North America from a three phase system are 120/208 volts.
How to convert a generator three phase output to single phase?
If the generator is a 12 lead reconnectable, you can use something called a zig-zag connection.Check the link below. It is an installation manual for a Marathon generator. Zig-zag connections are shown on page 8. For a home, you would use the low zig-zag connection for 120/240V (in the US). One caveat: you can only load a zig-zag single-phase connected generator to a maximum of 66% of its rated load. So, a 15kW 3-phase generator would only provide 10kW single-phase power. If this doesn't quite make sense, hire a pro!IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.
What happens when you disconnect a neutral at source in a three phase system?
== == == == It is true. Damage will most likely result somewhere, maybe not everything. When a neutral on a multi-wire circuit is opened (open-circuited) (removed) (cut) while things are under load, the voltage will change at the loads. Some loads will get more than normal, some will get less. The damage usually occurs on the side that gets MORE voltage. For example: your TV may be on a circuit that goes from 120volts to 50 volts, while your light bulb goes from 120volts to 180volts and blows. It all depends on how "balanced" the circuit is. In theory, if the loads are perfectly balanced then the neutral is not needed. In reality loads vary constantly, therefore, the voltage will vary if the neutral is open-circuited. That means running with an open neutral is something that anyone with any smarts at all will not do. It is absolutely possible to damage equipment by opening the neutral in some circumstances. As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.If you do this work yourself, always turn off the powerat the breaker box/fuse panel BEFORE you attempt to do any work ANDalways use an electrician's test meter having metal-tipped probes(not a simple proximity voltage indicator)to insure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
What and where is the voltage limiter on a 1989 ford f 250 4x4?
Voltage Regulator? In the alternator voltage limiter? voltage regulator...a little square box usually located on the driver side wheel well.
What size underground feeder wire is needed from a 400 amp breaker to a 125 amp panel box. The total distance is 100 feet?
1/0 <<>> This is a voltage drop question. A voltage and whether it is a single or three phase system must be provided to give an answer.
How do you install a 110v receptacle from a 3 phase breaker box if there are no neutrals in the breaker box?
If there is no neutral available you cannot, unless you use an autotransformer and derive a neutral. A panel with no neutral is called a power panel and is used to supply 240 single and three phase loads.
What is the advantage of using two phase in single phase motor?
Two phase motors are a thing of the past and are not used today if any still exist. Two phase legs are classified as a single phase system. If the question refers to a dual voltage motor then the answer depends upon what supply voltages are available to operate the motor. Operating a motor at the higher of the two voltages means that smaller control equipment and wire feeders can be used to operate the motor. If the nameplate is checked, in the amperage box there will be two current ratings, Amps/Amps. One will be half of the other one. Look at the supply voltage box and you will see the corresponding Voltage/Voltage. The first number in the voltage box corresponds to the first number in the amperage box. The higher the voltage the less line loss will occur over a distance. If possible always try and use the highest voltage to operate motors.
What size wire is needed from your meter to your breaker box which is 120 feet away for 200 amp service?
This is a voltage drop question. A voltage value needs to be stated. Assuming that the 200 amp panel is a single phase 120/240 volt sub panel. A #1 copper conductor will limit the voltage drop to 3% or less when supplying 100 amps for 200 feet on a 240 volt system.
What is the relationship between phase and line voltage in a 3 phase generator?
The Voltage produced by the generator will be like 3 sets of your home's voltage (assuming we're looking at an outlet and not the 220V at the brkr box).Each phase (sinusoidal wave) will be separated by 120 degrees, so when the 1st phase starts the 2nd phase will start 1/20th of a second later. The 3rd phase then starts 1/40th of a second later, and the 1st phase starts again 1/60th of a second later which is the beginning of the second set of sin waves. This of course is based on the N. American Frequency of 60 hertz which is 60 cycles (waves) per second.AnswerFor a three-phase, three-wire, system the line voltages will be identical to the phase voltages.For a three-phase, four-wire, system the line voltages will be 1.732 times the value of the phase voltages.
Name one of the safety devices in the electrical panel box?
I don't know..... Go look in your box......SERIOUSLY.......
Why would a generator put out 240 volt single phase?
For a home generator, to supply voltage for devices that require 220 V or 240 V. An electric oven or clothes dryer are examples of such devices. The generator at the power plant actually generates electricity at a much higher voltage, for easier transmission (and those are 3-phase generators). Also most homes run on 240 single phase. Power is split at the breaker box. To supply 120 loads and 240 loads. 240 single phase is a common voltage.
How do you run a two circuit from a thee phase box for a water well?
A 3-phase panel can supply 3-wire loads, 2-wire loads and 4-wire loads. The 2 most common voltages for these panels is 480 and 208. The voltage of the panel indicates the voltage measured between any 2 of the 3 buses (copper bars) in the panel so for a 480 volt panel you would measure (with a voltmeter) 480 VAC or volts of alternating current. Most 3 phase panels also have a neutral bus which is essentially tied to ground. If you measure between any of the phase buses and the neutral you will get 277 volts in a 480 volt panel and 120 volts in a 208 volt panel. So, if you have a pump motor that is 2-wire and rated for 208 volts you can just install a double pole breaker in the 3-phase panel. if you want to power a normal receptacle from a 208 volt 3-phase panel you just install a single pole breaker. With the receptacle outlet you must have a neutral bus in the panel to connect neutral conductor from the receptacle. The 480 volt panel works the same way except the single pole breaker will provide 277 volts of power which can be used for many types of industrial lighting but never for receptacles. If you did, your blow dryer would work really good for about a minute, then it would burn up. Pump motors will have a voltage rating as well as a horse power rating. Many motors these days have a dual rating and will have something like 208/230 V on the nameplate. These pumps can be operated on 208 or 240 volts which is the normal voltage level for a house. If the pump only shows the 230 volt rating it still may work on 208 volts but may have a shorter life expectancy. I would always call the manufacturer and ask them if it can be run on the available voltage if not listed on the nameplate. There are also 240 volt 3-phase panels (mostly in industrial plants and some older commercial buildings) that connect exactly the same way as a 208 volt panel with a few exceptions. The neutral is only used for single pole and double pole loads and care must be used because one of the phases will give you 208 volts to neutral (code requires this phase to be "B phase" and marked orange). Many devices have been burned up, by careless electricians who connected circuits to the wrong panel bus.
What is a one gang switch what is a single phase circuit?
A one gang switch is like an ordinary switch box in your home. When there is more than one box, the electrical terminology used is ganging the boxes together. Two switches side by side in a single box is expressed as a two gang box. Three switches side by side in a single box is a three gang box. A single phase circuit is a circuit that gets is supply voltage from a single phase supply system. In North America the single phase supply voltages are 120/240 volts. A single phase circuit can also be supplied from any two legs of a three phase system. The most common voltages in North America from a three phase system are 120/208 volts.
What is the color of a phase conductor?
well that all depends when your dealing with what voltage is being applied to your motor,home, or building. the phase conductor in A panel box can be labeled with either red, or blue tape meaning that's the phase conductor or hot. This all comes down to with what type of electrical equipment or service your working with, The word phase just means that's the hot side and the hot side is usually the black wire, although a red or blue wire can to. Plus a wire being the hot conductor, or load the NEC likes to call it the phase conductor.CommentThe term 'phase' conductor, in this context, is incorrect. The correct term is 'line' conductor.
How do you wire a 3 phase appliance with no 3 phase supply?
There is really no way to do this short of buying a phase converter with the proper kW rating to convert your single-phase power to three-phase. This route is seldom cost-effective.There is no 'wiring method' where you can simply hook up the wires and have it work.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.
Can a 440 volt single phase device be made to run on 220 volt single phase?
Not directly. You could use a 220V - 440V transformer to boost the voltage up to 440. Be sure its rated for the proper KW. Check the nameplate on the device for the KW rating. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.
