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Answer for USA, Canada and countries running a 60 Hertz supply service.

In commercial and industrial installations it is important to have the whole building phased correctly. Usually these types of businesses are three phase. Three phase motors that have plugs on them for quick swapping in case of a break down can be connected anywhere in the plant and still have the correct rotation. Also if the business has a stand by generator it also has to be correctly phased with the plant so as not to reverse three phase equipment when the generator starts. Phase sequence from left to right is A, B, C.

I'm not an electrician but i do know that in some motors if any of the positive wires are swapped from there correct place the motor will run backwards (in the wrong direction) it is important to know the correct sequence.

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Q: Why is correct equipment important in three phase?
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What is the purpose of a phase conductor?

There is no such thing as a 'phase conductor'; the correct term is 'line conductor'. In a single-phase system, the line conductor is the energised conductor; in a three-phase system, there are three (energised) line conductors.


Do they make 3 phase oven for home use?

Three phase ovens are made for home use. It is important however to know if the home is wired for three phase or for single phase.


what is the cheapest electric supply cost single phase or 3 phase?

The cheapest service to construct is a single phase service. A three phase service requires more equipment and materials to complete a service.


Will three phase power damage single phase appliances?

If you plug a single phase appliance into a three phase power supply, then you will be using single phase power. It does not matter if you are delta connected, AB, BC, or CA, or if you are wye connected, AN, BN, or CN. Yes, if there was "a problem", you would trip the supply. Question, however, is what do you define as "a problem"? Three phase power is intended to supply three phase appliances. Connecting a single phase appliance to three phase power is inconsistent with the objective, and such connection must have been performed by some kind of "jury-rigging". If you pull more than the trip current on any one phase, the supply should trip. If a malfunction in the single phase application, however, were to result in fault current that is lower than the trip current, you might not trip, and you might create damage and/or a fire. There is nothing wrong with building a branch circuit that feed a single phase load from one phase of a three phase source. You just need to provide the correct protection for that intended load.


Why is important for three phase supply voltage to be in-phase?

The phase voltages (i.e. line-to-neutral in a 4-wire system, or line-to-line in a 3-wire system) of a three-phase system are displaced from each other by 120 electrical degrees. Each phase voltage, in fact, is rarely in phase with its phase current, as the phase-angle (the angle by which a phase current lags or leads its phase voltage) is determined by the load not by the supply.In general, most loads are resistive-inductive so the phase current usually lags the phase current.So, to answer your question, it's not important that a phase current is in phase with its phase voltage -if that is what you are asking.

Related questions

Where are three phase transformer systems used?

Any where that a three phase supply distribution is needed to operate three phase equipment.


Does a two phase heater need a two phase thermostat?

Most electrical equipment are either designed to work on Single phase (two wires) or Three Phase (three or four wires). Two phase equipment are non existent today. A single phase heater will require a single phase thermostat while a three phase heater will require a three phase thermostat.


What is the advantages and disadvantages of single phase and three phase?

Single phase inherently requires less equipment (it's cheaper). Three phase motors are more efficient than single phase.


What equipment is used to check phase rotation?

A phase rotation meter. Or a small three phase motor can be wired up and its rotation observed.


What is phase conductor?

There is no such thing as a 'phase conductor'. The correct term is 'line conductor'. Line conductors are the three energised conductors that supply a three-phase load.


There is three methods of interconnecting the three separate coils inside the three-phase generator?

Yes you are correct.


When an organization plans effectively it plans in three phase staring with the one that should come first what is the correct order of the phase?

first phase second phase third phase


What is the purpose of a phase conductor?

There is no such thing as a 'phase conductor'; the correct term is 'line conductor'. In a single-phase system, the line conductor is the energised conductor; in a three-phase system, there are three (energised) line conductors.


Do they make 3 phase oven for home use?

Three phase ovens are made for home use. It is important however to know if the home is wired for three phase or for single phase.


what is the cheapest electric supply cost single phase or 3 phase?

The cheapest service to construct is a single phase service. A three phase service requires more equipment and materials to complete a service.


What is a name used in chemistry in place of phase?

If you are talking about phase in the context of "the three phases of matter", (eg gas, liquid, solid), then a similar term used is "the three states of matter". If you are talking about phase in the context of oscillations, "phase" or "phase difference" is correct.


Where can you find a single pole triple throw mini switch?

These types of switches are usually found in three phase installations. When breaking line voltages in a three phase system all three hot legs must be opened to isolate the equipment. These types of switches come in different types for specific uses. Molded case breakers for circuit conductor protection. Non fused switches for equipment transference and fused switches for three phase service entrance equipment.