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When taking power from one phase of a 240 Volt circuit to make a 15A 120 Volt circuit how do you fuse the new circuit?
Wiki User
∙ 14y ago
Don't do this! The fuses and breakers on a 240 Volt circuit should be left as they are, to supply 240 Volt appliances and nothing else. It is only safe to install a new 120 volt circuit by fitting a new 15 Amp breaker and run new wiring of the correct size for the length of run, all the way from the breaker panel to the new 120 Volt socket outlet.
Before you do this you must check the wiring code for your locality (town/state) to be sure you know if the new circuit needs a protective device such as a GFCI or RCD.
In most places a GFCI or RCD will be mandatory if the new socket outlet is to be installed in a place that is likely to be subject to water spray, wet or damp floors, walls or ceilings. This includes kitchens, bathrooms or shower rooms, or anywhere outside the building such as pool areas. <><><>
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.
Before you do any work yourself,
on electrical circuits, equipment or appliances,
always use a test meter to ensure the circuit is, in fact, de-energized.
IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.
Wiki User
∙ 14y ago
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A three-wire installation provides a power source for?
Answer for USA, Canada and countries running a 60 Hz supply service.A three wire installation provides a power source for independent 120 volt circuits and 240 volt circuit with neutral.A common 120/240 volt 200 amp distribution service panel can have 42 circuits supplied from it. These circuits can be in any number of different combinations of 120 volts or 240 volts.
What is the relation between KW and HP?
When calculating kW, power factor is brought into the equationFormula for single phase kVA = I x E/1000,3 phase kVA = I x E x 1.73/1000Formula for single phase KW = I x E x pf/1000,3 phase kW = I x E x 1.73 x pf/1000Alternative AnswerWhen an AC current flows through a purely resistive circuits, its temperature increases above the ambient temperature, and energy is lost to the surroundings through heat transfer. This energy transfer is irreversible. The rate at which this energy loss is taking place is called the true power of the circuit, and is expressed in watts (symbol: W).When an AC current flows through a purely reactive (i.e. inductive or capacitive) circuit, during the first quarter-cycle, energy is stored in the magnetic or electric field, and returned to the circuit during the next quarter cycle. So, although energy transfer is taking place, there is no net loss of energy. The rate at which this energy transfer is taking place is called the reactive power of the circuit, and is expressed in reactive volt amperes(symbol: var).However, most practical circuits are inductive-reactive circuits. So, when AC current flows through an inductive-reactive circuit, some energy is permanently lost while some energy is transferred from and back to the circuit. In other words, most circuits exhibit a combination of true power and reactive power. The vector sum of true power and reactive power is called apparent power, and is expressed in volt amperes (symbol: V.A).To summarise:(Apparent Power)2 = (True Power)2 + (Reactive Power)2From the above equation, in a purely resistive circuit, the apparent power will be equal to the true power. For resistive-reactive circuits, the apparent power will always be larger than the true power.Read more: What_is_KW_and_KVA
How can you get 277V from residential service?
1You could get 220-240V from using the two live ["hot"] wires rather than one live and one neutral. 2Tim, Industrial control transformers are available to get 120 volts from 277 volt systems. If you feed one of these with 120 volts to the secondary coil, it will put out 277 volt from the primary. However, these are rare and are not cheap. If you are trying to use surplus 277 volt fluorescent lights on a 120 volt system, it would be cheaper to replace the ballasts in the fixtures. Another approach would be to use an autotransformer with a 240 volt primary and a 32 volt secondary. If you feed it with 240 volt and wire it to boost +32 volts that will give you 272 volt which should run the lights. But again, you are looking at $60 - $100 for one circuit of lights. 3If you have access to three phase power..... Phase to ground on a 480v 3 phase system is 277v.
How do you get 380 volt from 220 3 phase?
Only with a 3 phase transformer.
Calculate watts for a 4160 volt 55 amp 80 power factor 3 phase motor?
317.025280 KILOWATTS = 317,025.28 WATTS
In a 240 volt single phase circuit A phase is 4000 watts B phase is 7000 watts what is the neutral load?
Question is incorrect. in a 240 Volt single phase circuit, how can you have A phase and B phase?
How do you get a 380 volt 3 phase motor to run on a 220 volt 3 phase power source?
Use a transformer.
Which power is product of voltage and current in a circuit calculated without considering the phase shift that may be present between the voltage and current?
I'm not sure there is a term other than "power"; V*A, or the vector sum of real and reactive power is equivalent to the power calculated by multiplying the voltage times the current, ignoring phase shift.AnswerThe product of voltage and current in an a.c. circuit is called 'apparent power', expressed in volt amperes, in order to distinguish it from 'true power' (in watts) and 'reactive power' (in reactive volt amperes).
How do you test the power in a circuit?
A volt meter will do the job.
Can a standard 40 amp 208-240 volt single phase oven be wired to a 240 volt three phase circuit without using a transformer?
See Discussion Page
Can you use 220 Volt 3 Phase as 208 Volt 3 Phase?
Yes by using a 3-phase transformer. The size depends on how much power has to be converted.
How much power is produced by a circuit by a 9 amp 27 volt circuit?
Power equals the product of current and voltage. The power used by a 9 amp 27 volt circuit is 243 watts. The power produced by the device, however, depends on the device's efficiency.
How do you change a 3 phase 440 volt motor to a 3 phase 220 volt motor?
You can not change it. 440 volt is by design. However you run it with 220 single phase supply, but it would run far lower power.
The power cable assembly connects to a power source?
208 volt, three phase
Can you run a 570 volt motor on 480 volt three phase power supply?
No, the voltage difference is too much. A 570 volt motor falls in the 600 volt range which is separate from the 480 volt range of three phase systems.
How do you get single phase 440 from three phase 440?
You Don't. 440volt 3-phase is actually 480 volts, taking a single phase gives 277Volts single phase. To get single phase 440 you would use one leg of three phase 440/760 three phase power.
Can you run a 208 volt single-phase computer off 240 volt power?
No. The 1-phase 240 setting on your computer's power supply is for the 240V wall outlets in other countries. The 240 outlets in your home are 2-phase 240.
