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A 1250 MCM copper conductor with an insulation factor of 90 degrees C is rated at 645 amps. If you have ever worked with these sized conductors you would know that it is nearly impossible to bend, let alone pull it into a conduit. Seeing how the conductor size is over 1/0, it can be paralleled up to smaller size conductors to meet the ampacity requirement. The options are, parallel 350 MCM, triple parallel #2/0 or quad parallel using #1/0 size wire. These wires are terminated in double, triple and four barrel lugs respectively. It has to be kept in mind that as the amount of wires increase, so does the conduit diameter size, to accommodate the conduit fill code rule.
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A three phase load taking a full load of X Amps means it is sum of three phase?
In a three-phase system, the total load is the sum of the currents in each of the three phases. This is due to the balanced nature of three-phase systems, where the currents in each phase are equal in magnitude but shifted by 120 degrees. The full load of X Amps is the total current drawn by the load across all three phases.
Can you use single phase kwh meter for three phase load?
No, a single phase kWh meter is designed to measure the energy consumption of single phase loads only. To measure the energy consumption of a three phase load, you would need a three phase kWh meter specifically designed for that purpose. Using a single phase meter for a three phase load would not provide accurate energy consumption readings.
Why is the amperage in single phase double than of 3 phase?
If I have 1 KW In 3 Phase it will give 1.54 A and In single phase it will give 4.6 AFor cosF 0.9V 415 3 phV 240 1 phIt seems the reason is because the current is carried on more wires. Also, remember that if wattage stays constant, then as voltage increases, current decreases.AnswerIt really depends on the load. Are you assumining the three-phase load to be the same as the single-phase load or, as it is likely to be in practice, three times the value of the single-phase load?But, in either case, the single-phase current will not be double the the three-phase (line) current!The equation for the load current supplying a single-phase is: I = P / (E x power factor)The equation for the line current supplying a balanced three-phase system is: IL = P / (1.732 x E x power factor)If you insert real figures into these equations, (240 V for the single-phase voltage and 415 V for the three-phase line voltage) then you will find that, when the three-phase load is threetimes that of the single-phase load, the supply currents will be exactly the same. On the other hand, if you assume that the three-phase load is exactly the same as the single-phase load, then you will find that the three-phase line current will be one-third that of the single-phase current.
How many wires are used for a 460 volt circuit breaker?
A 460 volt circuit breaker typically requires three wires: one for the hot conductor, one for the neutral conductor, and one for the ground conductor. These wires together make up a three-phase electrical system commonly used for industrial and commercial applications.
What is the effect to a three phase system if a single phase load is drawn from it?
A single-phase load can be connected to a three-phase supply either by connecting it between any pair of line conductors or, for a three-phase, four-wire, system, between any line conductor and the neutral conductor -providing, of course, that the resulting voltage matches the requirement of the single-phase load. This is quite a common arrangement, and the utility company will always try to maintain a reasonably 'balanced' load by connecting a number of single-phase loads between alternate line conductors (e.g. A-B, B-C, C-A, etc., or A-N, B-N, C-N, etc.). So, to return to the question: 'What is the effect on a three-phase system if a single-phase load is connected to it?', the answer is that the three-phase system can normally deal with it without any problem.
What are the uses of single phase or three phase motor?
torque load, generation load, power correction load
A three phase load taking a full load of X Amps means it is sum of three phase?
In a three-phase system, the total load is the sum of the currents in each of the three phases. This is due to the balanced nature of three-phase systems, where the currents in each phase are equal in magnitude but shifted by 120 degrees. The full load of X Amps is the total current drawn by the load across all three phases.
What is the rating of circuit breaker needed for a 500kva load?
To answer this question a voltage needs to be stated and whether the load is three phase or single phase. Without the voltage the amperage can not be calculated. For single phase, Amps = kva x 1000/voltage, for three phase, Amps = kva x 1000/1.73 x voltage.
How do you balance the unbalanced load in 3 phase?
If the load is connected in wye (star) and it has a neutral, then the vectorial-difference of the phase currents will flow in the neutral and there will be no problem. On the other hand, if there is no neutral, then an unbalanced load would cause unbalanced phase voltages.
Can you use single phase kwh meter for three phase load?
No, a single phase kWh meter is designed to measure the energy consumption of single phase loads only. To measure the energy consumption of a three phase load, you would need a three phase kWh meter specifically designed for that purpose. Using a single phase meter for a three phase load would not provide accurate energy consumption readings.
Is line to line fault a 3 phase fault?
'Line conductors' are the three 'hot' conductors (A-B-C) that connect a three-phase supply to a three-phase load. In some cases, a pair of line conductors (e.g. A-B, B-C, or C-A) is used to supply a single-phase load. A 'line fault' can be a short-circuit fault between all three, or any two, of these line conductors -whether they supply a three-phase load or a single-phase load.
What is a balanced three phase system?
A balanced three phase system is where the currents into the loads placed on all three phases of the service are reasonably close to each other in amperage.Another opinionA 'balanced' three-phase system describes a three-phase load in which each phase current is identical in both magnitude and phase. If the phase currents are only 'reasonably close', then the load is not balanced.
How do you calculate how to split a 7.5Kw load over 3 phases?
A 7.5 kW three phase load will be balanced by the manufacturer. When connected to a three phase source the line current on each phase will be equal.
Can you break a three phase from a disconnect?
If you mean can you splice in a second circuit from the load side of a three phase disconnect then the answer is no.
What is three-phase unbalanced load?
A balanced three phase load is where the current flowing in all three phases of the load are reasonably close to each other.Another answerWhen the voltage and measured current draw do not deviate by more than 2 percent under load.AnswerA balanced three-phase load is one in which each of the three loads is identical in all respects (magnitude and phase). Further to the first answer, the three line currents must not all be 'reasonably close', they must be identical -i.e. the same value and phase relationship.
Why is the amperage in single phase double than of 3 phase?
If I have 1 KW In 3 Phase it will give 1.54 A and In single phase it will give 4.6 AFor cosF 0.9V 415 3 phV 240 1 phIt seems the reason is because the current is carried on more wires. Also, remember that if wattage stays constant, then as voltage increases, current decreases.AnswerIt really depends on the load. Are you assumining the three-phase load to be the same as the single-phase load or, as it is likely to be in practice, three times the value of the single-phase load?But, in either case, the single-phase current will not be double the the three-phase (line) current!The equation for the load current supplying a single-phase is: I = P / (E x power factor)The equation for the line current supplying a balanced three-phase system is: IL = P / (1.732 x E x power factor)If you insert real figures into these equations, (240 V for the single-phase voltage and 415 V for the three-phase line voltage) then you will find that, when the three-phase load is threetimes that of the single-phase load, the supply currents will be exactly the same. On the other hand, if you assume that the three-phase load is exactly the same as the single-phase load, then you will find that the three-phase line current will be one-third that of the single-phase current.
How many wires are used for a 460 volt circuit breaker?
A 460 volt circuit breaker typically requires three wires: one for the hot conductor, one for the neutral conductor, and one for the ground conductor. These wires together make up a three-phase electrical system commonly used for industrial and commercial applications.
