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cable size for 90 amps 3 phase 440 v
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A #3 copper conductor with an insulation factor of 75 or 90 degrees C is rated at 100 and 105 amps respectively.
If this feeder is for a motor connection the wire size has to be increased to 125% of the full load amps of the motor.
Wiki User
∙ 11y ago
Wiki User
∙ 13y agoThe required cable size is based on the amperage draw of the motor. The motor amperage stated is 120 amps. The electrical code states that the conductor capacity of a motor load has to be 125% of the motors full load amps. 120 x 125% = 150 amps. Form the electrical code book, a #1 wire with an insulation factor of 75 or 90 degrees C is rated at 130 and 140 amps respectively. The insulation rating must be rated at 600 volts.
Wiki User
∙ 12y agoIf you are trying to size a wire for voltage drop calculations a voltage must be stated. A #2 copper wire with an insulation factor of 75 and 90 degrees C is rated at 115 and 120 amps respectively. Depending on the voltage applied to the circuit may cause the wire size to be increased to a larger size.
Wiki User
∙ 12y agoif you dont know you shouldnt be touching anything electrical
Wiki User
∙ 9y ago10 sq. mm should be used for a length of up to 50 metres.
Wiki User
∙ 11y agoA #3 copper conductor with an insulation factor of 75 or 90 degrees C is rated at 100 and 110 amps respectively.
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How many wires come in from the weather head?
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
How many watt generator to run a 150 amp service?
You will need a 50 kW generator for a single phase 120/240 volt service.
How many volts come out of the transformer to go to the house?
There are 240 volts for a single phase service. <<>> A single phase transformer that feeds homes has three bushings. The two outside bushings are the working voltage (house connections 240 volts). The middle bushing is a center tap of the secondary coil. This gives a voltage of (bushing left to center 120 volts) and (bushing center to bushing right 120 volts) The center tap of this transformer is grounded and connected to the single grounded eight foot lower conductor if it is a pole transformer. The single phase service neutral is established at this point. These three secondary points are connected by triplex to the homes weather head where another connection is made to the homes service distribution. This is classed as a 120/240 volt service.
How much more power does three phase produce?
Single-phase and three-phase can both produce as much power as required if they are correctly designed. Three-phase is used for transmitting power over distances because more power can be transmitted for a given amount of wire. Take three single-phase supplies each transmitting 10 kVA as an example. They use 6 wires in total. Now make them peak out of step, 120 degrees apart in phase. Next, connect the neutral wires together at each end. It will be found that no current is flowing in the neutral wires, so they can be removed. Therefore you are transmitting the same 30 kVA using half the amount of wire by using the 3-phase system. Each live wire acts as the return wire for the other two live wires. This is important when transmitting power for many miles, when the wire is a significant cost.
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.
How many wires come in from the weather head?
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
How many wires in a single phase motor?
There should be 2 or 3 wires. A hot, a neutral and sometimes a ground.
How many earth wires are required for single phase motor?
There is only one ground wire needed on any motor, single or three phase.
How many single phase can you run on a 100amp 3 phase?
You can divide a three phase service into (3) single phase circuits providing you have a 4th neutral wire.
How many wire or core in three phase electrical connection and single-phase electrical connection?
A single-phase cable will have a line and a neutral conductor and, possibly, but not necessarily, an earth (ground) conductor. A high-voltage three-phase cable will have three line conductors. A low-voltage three-phase cable is likely to have three line conductors and a neutral conductor.
In single phase 1 TR equals how many KW?
1TR = 3.5KW in Single phase and 1.2KW in 3-phase
A three phrase circuit has how many hot wires?
Three wires carry the three phase energy.
How many wires are there in 120 volt single phase power and how are they marked?
Verify wiring layouts by making measurements, before connecting and/or energizing equipment. A 120V single phase 2 wire should have one hot wire, a 230V single phase 2 wire should be assumed to have two hot wires, and a 230V single phase 3 wire also should have two hot wires.
How many wires do you need if you are stepping up single phase 120-240V to 480volts?
Five wires. Two on the primary side, connected to each 120V leg, giving a primary voltage of 240V. Two on the secondary side, one connected to neutral, and the other the new 480V hot. One connecting the frame of the transformer and the box containing it to ground. Note: you will only get one phase power out of this configuration - to get three phase output, you need three phase input, three transformers, and a lot more wires.
How many watt generator to run a 150 amp service?
You will need a 50 kW generator for a single phase 120/240 volt service.
How can you convert household AC electrical power from single phase to three phase?
For low-power appliances you can buy an electronic power inverter which produces 3-phase outputs from a 1-phase (single phase) service. Such inverters are not cheap to buy so you must decide if it is best to buy an equivalent appliance that runs on 1-phase instead of trying to use a 3-phase appliance on a 1-phase supply using a power inverter. Note: For mains power any 1-phase service is usually obtained by using just one phase of a 3-phase service that comes in overhead or underground cables from the generating station. The power company typically supplies a given neighborhood with a 3-phase service and distributes it as separate 1-phase services, one phase per property or group of properties, so that each property gets a supply of single-phase power. If the owner requires it, it is usually possible to pay the power company to provide a 3-phase service into a house or any other type of property - such as an engineering workshop, vehicle repair garage, etc. - which may need a 3-phase service for machinery or other equipment. +++ An advantage of using an inverter is that many are available with reversing and speed-control, so ideal for driving lathes and similar. Moreover, the machine runs more smoothly: in my own case the noisy resonance of a lathe's welded cabinet stand when running with a single-phase motor stopped entirely when I fitted a 3ph motor and inverter to the same mountings.
How many phases contains a single substance?
A single substance has one phase.
