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# If you are trying to wire up a three-phase motor from a three-phase panel which breaker and what wire type should you use?

# How do you wire a three phase motor if none of the wires are idetified?

If it is a three lead 3-phase motor, it is easy: connect the incoming three leads randomly to the three leads on the motor (one to one) so that there are a total of… three splices. The motor will run but possibly in reverse If it runs in reverse, switch any two of the three splices ---- If the motor has more than three leads, and they are not marked, it is much more difficult. You will have to have a working knowledge of how to test the leads and compare the results with the information given on the nameplate

# What size wire and breaker for a 40 hp 230 volt 3 phase motor?

It depends on how long the electrical run is. (less than 50 feet, less than 150ft, or etc). Convert horsepower into kilowatts 40*.746=29,000 watts Convert watts to amper…age: 29000/230v=126 amps Since it is 3 phase, you divide amperage by approx 1/2 for each leg: 126/2=63 amps for each leg running draw. You could use (3) 80 amp breakers and 4 ga wire for runs 50 feet or less. 2 ga for longer runs. You may have to use a 100 amp breaker for starting surges. Check with a professional electrician to make sure this meets code and is adequate. 40hp motor wiring needs advice of an expert!!!! The formula you are looking for is I = HP x 745/1.73 x E x 5eff x pf. I = 40 x 746 = 29840. 29840/1.73 x 230 x .87 x .89 = 29840/308 = 97 amps. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92. A feeder for a motor has to be rated at 125% of the motors full load amps 97 x 125% = 121 amps A #2 copper conductor with an insulation rating of 90 degrees C is rated at 130 amps. A breaker for a motor has to be rated at 250% of the motors full load amps 97 x 250% = 242. A three pole 250 amp breaker will be appropiate in this situation.

# What size wire and breaker for a 25 hp 240 volt 3 phase motor?

Wire sizing is based on the amperage needed by the load. The equation used to find amperage when the HP is shown is; A = HP x 746/1.73 x V x %eff x pf. Amps = 25 x 746 = 18650…/1.73 x 240 x .87 x .87 = 18650/314 = 60 amps. A standard motor's efficiency between 5 to 100 HP is .84 to .91. A standard motor's power factor between 10 to 100 HP is .86 to .92. Motor feeders have to be rated at 125% of the motors full load amperage. 60 x 125% = 75 amps. A #4 copper conductor with an insulation rating of 75 or 90 degrees C are both rated at 85 amps. The breaker has to be 250% of the motors full load amperage 60 x 250% = 150 amps The breaker will be a three pole 150 amp breaker connected to three #4 copper conductors to operate a 25 HP 240 volt three phase motor.

# What kind of circuit breaker should you use with aluminum wire?

Almost all circuit breakers are rated for copper (cu) or aluminum (al), there is a label on every breaker made, as long as it has the (al) marking it is suitable for use with …aluminum wire

# What wire size should you use for with a 50 amp breaker?

8 awg (american wire gauge) wire minimum, although #6 is preferred.

# What size wire and breaker for a 15 hp 240 volt single phase motor?

The rule of thumb for a single phase 240 volt motor is 7 amps per HP. The code book only includes up to 10 HP motors. So 7 x 15 = 105 amps. Motor conductors have to be rated… at 125% of the full load amps. 105 x 125% = 131 amps. A #1 copper wire with an insulation factor of 90 degrees C is rated at 140 amps. The breaker for a motor load should be 250 % of the full load amperage. 105 x 250% = 263 amps. The next biggest size breaker up from 200 amps is 300 amps which will work and still be within the electrical code standards. It is for this exact reason that larger size motors are usually three phase and require higher working voltages to reduce the wire size and breaker sizes.

# What size wire should you use on a 25 amp breaker?

You should use # 10 gauge wire, solid or stranded.(by Code)

# How do you wire a three phase motor with two speed to a three phase power supply?

A typical 2 speed three phase motor will have 6 leads on the motor windings which will require 3 contactors to incorperate both the "high" and the "low" speeps. Inorder for th…e motor to run on "low" speed you need to have a contactor (c1) that pulls in for the L1, L2,L3 leads... that should achieve the "low" speed of the motor.. To achieve the "high" speed you will need a contactor (c2) to shun or short L1,L2,L3 together... and another contactor (c3) to pull in the L4,L5,L6 leads... to recap ... Low speed will requrie c1= L1,L2,L3 powered by phase 1, phase 2, phase 3 of the primary source voltage. High speed requires c2 to short or shun L1,L2,L3 together while c3= L4,L5,L6 to be powered by Phase 1, Phase 2, Phase 3 fo the primary source voltages. Be sure to check for proper rotation of the motor and by reversing any 2 leads of the primary source voltage you will change the rotation for the motor. This can also be done using two contactors by having L1,L2,L3 connected to the first contactor and also the additional contacts mounted on top of the second contactor. L4,L5,L6 are connected to the second contactor. The important thing to remember is to use an interlock which fits into both contactors when they are clipped together. This stops both contactors operating at the same time!!! ( the additional contacts mount on top of a contactor and are mechanically connected to it so that they act together)

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# How do you wire a three phase motor to a three phase power supply?

Answer Connect the 3 conductors of the power source to the 3 conductors of the motor turn the motor on for a brief moment to note the direction that it turn…s if the direction is reversed swap any 2 conductors. Answer Try this: www.tdk.co.jp/tefe02/e9123_zrgt_mf.pdf

# How do you wire a three phase motor with two speed?

Star and delta connection

# How does a three phase motor work on a two phase power supply and how do you wire it up?

A three phase motor will not work on a 2-phase power supply, it needs a 3-phase power supply. Two phase electrical services are no longer the standard for electrical distrib…ution. You would need to get an expensive phase-changer to convert your normal single phase power supply to three phase. Depending on the power output you require from the motor, it can often be much cheaper to buy a suitable single phase motor, new or secondhand, instead of buying a phase-changer as the power supply for a three phase motor. If you really do want use that three phase motor you may find it worthwhile to contact your electricity supplier first, to ask if they can install a three phase service for you to use and what the cost would be. Otherwise, after you have bought the expensive phase-changer unit, you may find out later that your electricity supplier could have upgraded your service to three phase for a lower cost!

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# Can you use braided wire in your breaker panel?

No. Braided wire is not considered "current-carrying". It is not sold or maufactured via AWG specs. It is manufactured via weight per foot. Braided wire is used for grounding …purposes only.

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# What is the wiring gauge breaker size and type single vs Double pole requirements for wiring in a 240v single phase 15amp 60HZ compressor motor?

You will need a two pole breaker for the 240 volt. Recommended wire size would be a #12 copper wire RW90 C connected to a two pole 30 amp breaker. As always, if y…ou are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed. Before you do any work yourself, on electrical circuits, equipment or appliances, always use a test meter to ensure the circuit is, in fact, de-energized. IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOB SAFELY AND COMPETENTLY REFER THIS WORK TO QUALIFIED PROFESSIONALS.

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# What size wire and breaker to use on 5HP 230V phase 1 56Hz compressor motor?

Use #8 copper wire THHN on a 70 amp breaker.

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# What gauge wire should be used for a 15 amp breaker?

The correct wire size for a 15 amp breaker is a #14 wire.

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# Why we don't used neutral in wire three phase motor?

neutral is only used for single phase motor's.Where we used three phase's in a motor this motor can't use neutral. Three phase motor's inside connected to the rotor and st…ater. Answer If the motor's windings are delta connected, then there is no neutral conductor. If the windings are connected in star (wye) then, because the windings represent a balanced load, there is no neutral current (the sum of the phase currents is zero for a balanced load) -so a neutral conductor would serve no purpose.