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What else can I help you with?
Do you need a neutral in your 3 phase disconnect to pump control?
Not usually, if the three phase pump is a three wire pump then the disconnect does not need a neutral. The pump control may or may not need a neutral depending on the voltage system that the control panel needs.
Why neutral is not requied in 3 phase?
As far as I understand, you don't need neutral line for connecting appliances that is 3-phase compilant. You only need the neutral line to connect a single phase appliance, which you connect along with one of the three lines.
Does a three phase motor have a neutral?
No, three phase motors do not actually have neutral line unless you are referring to the motor control centre where a neutral line is required when your control coils and other components are single phase operated
Do you need a neutral to install 480 volts 3 phase heater?
If the heater is rated as a 3 phase 480 volt heater then a neutral is not needed. If the voltage stated is 277 volts three phase then a neutral is needed.
Why is there no neutral point for delta?
There is no neutral in a delta connection, because that is the definition of delta, a power configuration where current flows from phase hot to phase hot. The loads are A-B, B-C, and C-A. Contrast this with star, where there is a neutral, and the loads are A-N, B-N, and C-N.
When does a motor not need a neutral wire?
If the motor is operated from a three phase three wire distribution system the motor will not need a neutral wire.
Do you need a neutral in your 3 phase disconnect to pump control?
Not usually, if the three phase pump is a three wire pump then the disconnect does not need a neutral. The pump control may or may not need a neutral depending on the voltage system that the control panel needs.
Why neutral is not requied in 3 phase?
As far as I understand, you don't need neutral line for connecting appliances that is 3-phase compilant. You only need the neutral line to connect a single phase appliance, which you connect along with one of the three lines.
Why neutral cross section is half the phase in three phase cable while it has to carry current of summation of all phase..?
The current carried by the neutral of a three phase four wire system is the un balanced current. If the three phase system was completely balanced on all three phases there would be no need for a neutral, eg a three phase motor. This neutral current will be less that the phase current so a reduction in the neutral size is allowed.
Does a three phase motor have a neutral?
No, three phase motors do not actually have neutral line unless you are referring to the motor control centre where a neutral line is required when your control coils and other components are single phase operated
Do you need a neutral to install 480 volts 3 phase heater?
If the heater is rated as a 3 phase 480 volt heater then a neutral is not needed. If the voltage stated is 277 volts three phase then a neutral is needed.
Why is there no neutral point for delta?
There is no neutral in a delta connection, because that is the definition of delta, a power configuration where current flows from phase hot to phase hot. The loads are A-B, B-C, and C-A. Contrast this with star, where there is a neutral, and the loads are A-N, B-N, and C-N.
Does a 208 volt outlet need a neutral?
No a 208 volt outlet does not need a neutral. 208 volts is the line voltage between any two legs of a three phase 208 volt system.
How do you tap off of a 480 volt disconnect?
You don't. You hire a qualified electrician who doesn't need to read this page for the answer. That said, if you are merely curious as to the methods: "480" Volt will be 3-phase with either Delta wiring (480 phase-to-phase, NO neutral), or Wye wiring (480 phase-to-phase, and 277 phase-to-neutral). You can use this directly, to run three phase equipment from all three phases, to run equipment at 480 from just two phases (being careful to keep loads balanced), or to run lighting circuits from the 277-to-neutral (being careful to size the neutral conductor carefully). You can also step it down to "208", which will be 208 phase to phase and 120 phase to neutral -- "standard" line voltage. But seriously, if you need to ask the question, you SHOULD NOT be touching 480 switchgear and wiring, for the safety of both yourself and others.
How do you use a one phase motor in place of a three phase motor?
To use a single/one phase motor instead of a three phase motor is possible if you have a three phase power supply as you will only need to tap one of the three phases together with neutral and an earthwire, however to use a three phase motor instead of a single phase will require the provision of three phase power supply.
Why single phase is preferred to three phase?
Single phase is not preferred over three phase, it is the system used that the application needs to operate with. There are more single phase installations than three phase due to the fact homes operate on that system. Where as most commercial and industrial applications call for a three phase system to supply their power needs.Single-phase and three-phase are different types of power supply.Most houses and small businesses have a single-phase supply, which could be a simple live/neutral two-wire supply, or a split-phase supply with two lives and a neutral so that there is 120 v between the neutral and either live wire, but 240 v between the two live wires, which is used for loads of over 1500 watts.When necessary, properties that use more power have a three-phase supply which has three live wires and a neutral. The supply can be taken in the form of three separate single-phase supplies, or in some cases appliances such as large motors need a three-phase supply to work correctly.A three-phase supply is described by the voltage between any two of the three live wires, and the voltage from neutral to each live is 1/sqrt(3) times as much, in other words 42% less.Typical three-phase supplies are 120/208 v, 230/400 v, 240/415 v, 277/480 v and 347/600 v. The first figure is the live-neutral voltage and the second is the live-live voltage. Single-phase supplies can be taken between live and neutral or between lives.Three-phase is preferred for power transmission over longer distances, and voltages up to hundreds of kV are used. In this case the neutral is omitted because when the three currents in the live wires are equal the current in the neutral is zero.
How do you connect 480 vac three phase power to a 480 vac single phase transformer?
If the primary and the secondary windings of the three phase transformer are connected in delta, you cannot get a healthy neutral from it but why bother? You simply drive a rod into earth and use it as a neutral. Alternatively either the primary or the secondary windings must be connected as star and you use the common point as neutral.
