# What is the typical 460 3 phase voltage 1 leg to ground?

230v 230v In a transformer with a primary connected to 480V Delta and a secondary connected in 480V Star connection, the coil voltages to the star point (ground) are 277 volts 480 / 1.73 = 277 volts. Other star connections are 208/120 (208/1.73 = 120V), 600/347 (600/1.73 = 347V). Because the phase angles are not 180 degrees apart they are not additive, they are 120 degrees apart which is why 1.73 factor comes into play.

### Is 277 volt and 277 volt equals 460 volt?

No, voltages in a wye configuration are not additive. Calculations for wye connection used the nominal voltage of 480 volts. The voltage of 277 volts is derived from the the phase voltage of 480 divided by the square root of 3 (for three phase) . 480 / 1.73 = 277 volts. For phase voltage of 460 the coil voltage to ground will be 460/1.73 = 266 volts.

### How do you measure 3 phase voltage?

Three phase voltage can be measure line to line (L1-L2, L2-L3, or L1-L3) with a quality digital voltmeter. In the United States, typical 3 phase voltage is 208-230VAC, or 460-480VAC measured line to line. Line to ground or neutral with a 208-230V system will yield 110-120VAC, which provides standard household power for things like televisions and microwave ovens.

### Why on a certain 460 volts one leg to ground shows no voltage but when you have a reading on each phase 230 volts?

My first thought is this is probably a corner grounded delta system, but I'm confused by your voltages. If this was a 460v (L-L voltage) ungrounded or corner grounded system, the phase to ground voltage is meaningless, but the phase to phas voltage will be 460v all around the delta. If you have a 460v system and you're only seeing 230v, there's something wrong.

### What is the measured Voltage between L1 and Earth on 3 phase system?

Wouldn't this depend on the voltage of the system? Like if it is a 460 or 208v system it would be 208 or 460v. There should be 3 lines L1 L2 and L3 all measure the input voltage. The wye or star point voltage on a three phase system is the square root of three. This number (1.73) is divided into the three phase voltage to get the voltage to neutral (ground). 208/1.73 = 120…

### What household current do you need to power 460 volt motor?

There is no household current with which you can power a 460 volt motor. Normal US household power is 120/240VAC split phase. (Other countries have different configurations, but the answer remains the same.) Without a transformer, and a substantial power flow, you are not going to develop the voltage necessary to run a 460 volt motor. Even if you could generate that voltage, you still only have one phase available, and most 460 volt motors…

### Europe 3 phase motor wiring how to go to low voltage 230 volt AC Currently wired w2 u2 and v3 tied together with w1 u1 and vi to line for 460 voltage Y How do you wire for low voltage?

Leave 460 w1 u1 v1 to L1 L2 L3 the 230 incoming low voltage, feed wires for 230v will have to be a heaver wire, Unjump w2 u2 v2,then put a jumper from w2 to U1, next u2 to v1 are jumped together, last is v2 to w1 jumped together. Remember that the 460 wires are lighter wires, the wire gage is a larger number, always check your electrical references, 230v will be a heaver…

### Can you take a 460volt single phase circuit out of a 3 phase pannel?

Yes, assuming the panel is 460 volt, three phase. You will need to supply a 2-pole breaker of the proper current rating. The breaker installs on any two adjacent phases, such as A-B. Any two phases of 460 volt, three phase power will yield 460v single phase. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS. If you do this work yourself, always turn…

### Will a 60kw generator that puts out 477v 3-phase power run a machine that requires 230460v 3-phase?

Crank the generator excitation up to 480 or down to 460. For calculations I used 480 volts. A 60kW generator at 480 volts will put out, kW x 1000/1.73 x E x (pf(.9)) = 80 amps. It looks like the machine that is to be run off the generator is a dual voltage machine. Not knowing the HP of the machine wire it to the 460 volt connection. The inrush current might be a problem…

### What is proper ground wire size for 100 hp 3 phase motor?

Most common voltages for this applications: 208 vac grounding conductor 1/0 copper, 230 vac grounding conductor 1/0 copper, 460 vac grounding conductor #3 copper, this assumes breaker usage as over current device. Use of fuses would affect wire size. <<>> Again, to answer this question the voltage of the motor is needed.

### How do you rewire 460 volt three phase generator for 220 volt three phase?

The motor has to be a dual voltage motor for this operation to happen. This will be a six coil motor. Each motor coil will be rated for a 220 volt drop across it. For the high voltage connection the motor's coils are connected in series between L1 and L2, L2 and L3, and L3 and L1. For the low voltage connection the motor's coils are connected in parallel between L1 and L2, L2 and…

### How many wires are used for a 460 volt circuit breaker?

If the load is single phase and the load requires 460 volts to operate, then two conductors will be needed and they will connect to a two pole breaker. If the load is three phase and the load requires 460 volts to operate, then three conductors will be needed and they will connected to a three pole breaker. The sizing of the wires will depend upon the current that is drawn by the loads.

### Can a 230-460 volt 3 phase motor be connected to a 277-480 volt 3 phase circuit?

The motor sounds like a multi-voltage motor that can be wired either 230v or 460v depending on how the leads are wired. So yes it should be able to be hooked to a 3 phase 480v system just make sure you follow the wiring diagram for hooking the leads up to 480v. when a manufacturer list 230v it normally operates at 240v and the same for 460v operating at 480 volts

### How many amps does a 1.5 hp motor pull?

To answer this question a voltage should be stated. Three phase motor, 230 volt 5.2 amps, 460 volt 2.6 amps, 575 volt 2.1. Single phase motor, 115 volt 20 amps, 230 volt 10 amps. These are nominal amperages from the code book. For accurate calculations the amperage should be taken from the motors name plate.

### How do you explain the difference in 440V 460V and 480V?

In the United States, 480 Volts (AC) is a nominal system voltage before it is distributed to the device being powered. Line losses (measured in volts) occur throughout the distribution system due to current passing through wires and devices which have a resistance. Manufacturers of end use devices, such as motors, take this into account and list their devices as 460 volt devices. So, what this means is that you will see transformers and circuit…