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What size wire is needed for 400 amp 480 volt service?
A 500 MCM wire with an insulation factor of 90 degrees C is rated at 430. Most 400 amp services will use parallel wires on each leg to feed the circuit. A 3/0 wire with an insulation factor of 75 and 90 degrees C is rated at 200 and 225 amps respectively. The insulation rating of these conductors will be 600 volts.
What size wire paralleled for 600 amp single phase service?
A 350 MCM copper conductor with an insulation factor of 75 or 90 degree C is rated at 310 and 325 respectively. So depending on the insulation of the wire that is used, a parallel wire configuration will give you a total of 620 at 75 degrees C or 650 at 90 degrees C.
Can you run a 480 volt machine with 600 volt incoming voltage?
Yes, but the 600 volts would have to be transformed down to 480 volts. Direct connection to the motor with 600 volts would overheat the motor to destruction.
What size wire should you use to feed a 150 KVA transformer 480 3 phase primary - 240 volt 2 phase secondary?
The equation you are looking for is amperage = kva x 1000/1.73 x voltage.150 x 1000 = 150000/1.73 x 480 = 150000/830 = 180 amps for primary side of transformer.150 x 1000 = 150000/1.73 x 240 = 150000/415 = 361 amps for the secondary side of the transformer.The electrical code requires transformers and motors conductors to be sized at 125% of the rated amperage.So 180 x 125% = 225 amps, and 361 x 125% = 451 amps.A 3/0 copper conductor with an insulation factor of 90 degrees C is rated at 225 amps.A 600 MCM copper conductor with an insulation factor of 90 degrees C is rated at 475 amps.Parallel 3/0 copper conductors with an insulation factor of 90 degrees C will give a capacity of 450 amps.There is no 2 phase 240 volt secondary.Any two legs of a three phase system are classified as single phase. Single phase 240 volts can be obtained from any of the following transformer tap connections, A-B, B-C, C-A.
What size copper wire for a run of 500 feet in parallel for a resident with a load of 600 amps single phase 240 volt?
This is a voltage drop question. A 500 MCM copper or 750 MCM aluminium conductor will limit the voltage drop to 3% or less when supplying 300 amps for 500 feet on a 240 volt system. Paralleling these conductors will allow the rating to be increased to 600 amps.
What is 480 percent of 600?
480% of 600 is 2,880.
How do you come up with 277 volts?
The star point or wye voltage of a 480 volt three phase four wire system is 277 volts. The 480 voltage is divided by the sq root of 3 (for 3 phases). The sq root of 3 is 1.73. 480 volts/1.73 = 277 volts. The same formula is used on all three phase four wire systems. 208 volts /1.73 = 120 volts, 416 volts /1.73 = 240 volts, 600 volts / 1.73 = 347 volts.
What is the voltage of a 3 phase 4 wire 277 volt lighting circuit?
The voltage of 277 volts is the wye of a three phase 480 volt system. Just as the voltage of 347 is the wye voltage of a three phase 600 volt system. To obtain these voltages for any three phase system, take the three phase voltage and divide it by 1.73. 480/1.73 = 277 volts, 600/1.73 = 347 volts.
What connection is best suit for 3 phase 4 wire service?
It depends on where you are in the world. The other condition is what three phase four wire services are available. In North America a common service of apartment buildings is 120/208 volts. Voltages of 277/480 and 347/600 are mostly reserved for commercial and industrial installations.
What percentage is 480 out of 600?
480 ÷ 600 × 100 = 80%
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.
What is 1080-600?
1080-600 = 480
Why is a three phase four wire distribution system used?
A three phase four wire system allows for two voltages from a single three phase transformer. The transformer configuration is a wye or star connection. It is used in commercial and industrial applications. Apartment buildings are now starting to use a three phase four wire service distribution system. Some wye connection voltages are 120/208 volts, 480/277, and 600/347. The lower voltage is derived from the sq root of 3 divided into the three phase voltage.
How do you get 277 volts from a 480 volt line?
All three phase four wire systems have the ability to produce a voltage to ground or neutral. Take any phase voltage be it primary or secondary and divide it by the sq. root of 3 which equals (1.73) and you will obtain the phase to ground or neutral voltage. The ground and neutral should be of the same potential and when talking about electrical installations these two words get interchanged quite often. Some three phase secondary voltages are 208, 480 and 600 volts. Electricians will talk about voltages of 120/208, 277/480 and 347/600. The first number is the phase to neutral voltage and the second number is the phase to phase voltage.
What size service conductors do you need for a single phase 600 amp commercial panel?
The size of wire for service entrance conductors for a 400 amp 3 phase service could be 500 MCM copper. This is very large size wire and difficult to bend and shape, to connect to terminals in the main disconnect and distribution panel. This problem is solved by using parallel conductors or on higher ampacities triple conductors. Using parallel conductors the wire size would be three ought (3/0) copper.
What is the difference between 277 volts and 240 volts?
These voltages are both wye connection three phase voltages. The voltage difference comes from the primary three phase voltage supplies. 277 volts is obtained from 277 x 1.73 = 480 and 240 volts is obtained from 240 x 1.73 = 415. 480/277 volts is a common three phase American voltage. 415/240 volts is a European voltage. In Canada a common three phase voltage is 347/600. The 240 volts could also be a single phase voltage in North America derived from a split phase secondary on a distribution transformer that supplies 120/240 volts to homes.
What is the standard voltage and amperage in Toronto Canada?
The standard home voltage connection is single phase 120/240 volts. The amperage is what ever the service size requires. For new homes it is usually 200 amps. For business voltages it usually is three phase 120/208, amperage demand governed by equipment. For new industrial and commercial buildings the voltages are three phase 347/600 volts, amperage demand governed by equipment. For old industrial and commercial buildings the voltages are three phase 277/480 volts, amperage demand governed by equipment. The three phase 277/480 systems are being phased out for newer 347/600 systems.
