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What size time delay fuse do you use on a 40 hp 230 volt 3 phase motor?
Wiki User
∙ 10y ago
The electrical code book states that a 40 HP 230 volt three phase motor draws 104 amps. For that motor the wire must be rated for 131 amps, Non time delay fuses at 300 amps, time delay fuses at 175 amps or a 250 amp circuit breaker.
When calculating wire sizes and motor protection the motor's full load amperage should be taken from the motor's nameplate.
Wiki User
∙ 10y ago
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What size feeder and breaker is needed for a 15 ton AC - 3 phase at 440 Volts?
Would have to know the current rating of the motor or each of the phases on the motor when running. 3 Phase motors usually use mucvh less current than their single phase counterparts. My son has a lot of 3 phase equipment in his shop and most of them run under 5 amps per leg. But you really need those specs from the motor.
Can you convert single phase electric motor to three phase connection?
Three-phase motors will run on single-phase power. What they WON'T do is start. There is no easy way to re-wire such a large motor to run on a single phase.Properly sized capacitors and a special relay is sometimes used on sewage lift stations (poopie stations is what we call them) to run the 3-phase pumps on single phase.I've seen 10 hp motors used. Sometimes a lift station is needed where 3-phase power is not available The motor will not develop it's full horsepower, only about 2 thirds. A push-button can be used in place of the relay, but you will have to push the button until the motor starts then let go. If the motor stops you will need to push the button again. Usually expect several hundred micro-farads to be needed.I have used old A/C motor-run capacitors in parallel to experimentally determine the actual size (capacitance) needed. Be sure to use correct working voltage capacitors. DANGER!!! Electricity can EASILY kill you and capacitors can blow up in your face!!!I've seen crazy people attempt to rope-start three-phase motors (it works), connect phase converters, all sorts of weird stuff. In reality, single-phase 5hp motors are available, so the a good recommendation is to trade-in the 3-phase motor for a 1-phase motor of the size you need.To run a three phase equipment from a single phase source, you will need something called a "phase converter".Before you go out and buy one, find out if a single phase motor is available to match your requirements. It will probably be an easier solution for you if you can do that.Depending on your application, another option with such a large motor is to get a "Variable Frequency Drive". These are somewhat expensive but will take in a single-phase input and output 3-phase.As always, if you 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 JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
How fast is 234cc?
In motor bike wise it's a decent size / speed motor
Can stranded 8 SWG GI wire be used for motor earthing?
The size of grounding wires is dependant upon what the motor current category the motor fall into. The higher the motor amperage is, the higher the fault current will be so the larger the conductor size has to be to carry the fault current.
How do you size circuit breakers?
If you are using 14AWG wire in your circuit, you will fuse with a 15 amp breaker as 14AWG maximum amperage is 15 amps to 100 ft of wire. If the wire run is longer than 100ft, then you would fuse for 10 amps max. If you are using 12AWG then it can carry 20 amps, etc. Longer than 100ft you would fuse for 15amps. note: 14AWG is called 14/2 and 12Awg is called 12/2 commonly.
Fuse size for 7.5 HP 3 Phase 440 Volt Motor?
The electrical code states that a 7.5 HP 460 volt three phase motor draws 11 amps. For fuse sizes, non time delay - 30 amps, time delay type D - 20 amps and if using a breaker it will be 30 amps. Minimum wire size is #12 and the maximum setting of overload devices will be 13.75 amps
Minimum breaker size 60 horsepower motor?
Need motor voltage, amperage and phase to give you an anwer.
How do you select fuse for motor?
There should be a label on the motor with that information. If not, have the motor checked by a qualified electrician or electronic technician to determine the proper fuse size.
What is the cable size for 1.5KW 3 phase induction motor?
Sir, what is the cable size for 1.5kw 3phase induction motor 400v?
Can you replace a three phase motor 3 Hp RPM 1420 with a single phase motor for a planer?
Probably not. The single phase three horse power motor will be much larger in physical size than its three phase counterpart, and will probably not fit.
Can you run 22 kw 600v 3 phase induction motor?
Yes this size motor can be operated by bringing a 600 volt three phase supply to it.
What size fuse required for 11kw motor star delta starting?
This depends on the motor rating.
What size of circuit breaker do you use for 25amperes induction motor?
Read the specification plate on the motor to determine the amount of current that the motor uses, as well as the voltage and phase. Most likely, it will be a 3 phase motor, so you can't simply connect it to your house wiring, but without sufficient information, it is impossible to tell you all of the specifics. <<>> The code book rates the amperage of a three phase 40 HP motor by different voltages. at 200 volts - 120 amps, 230 volts - 104 amps, 460 volts - 52 amps and 575 volts - 52 amps. A breaker for a motor has to be sized to 250% of the motors full load amps. Also the wire size for a motor has to be 125% of the motor full load amps.
What is the cable size for 600V 3 phase ac motor?
you need the current of motor or the KW/HP rating
What size motor do you need to run a compressor 2 stage 80 gallon tank i have a 3 phase on it and want to change motor?
You probably need a 5hp or 7hp motor. Look for HP rating o the 3 phase motor and select the same for single phase. 3 phase has same power but is more efficient at electricity use. Also consider a 3 phase converter. It allows a 3 phase motor to run on single phase service.
What size of fuse should be used for 75 hp 415v 3 phase motor connection?
To answer this question, wire size is rated in the amount of amperage that it can legally carry. Fuse sizing is based on the amperage that the wire carries. The formula to find amperage when the HP is known is I = HP x 746/1.73 x E x %eff x pf. 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. Amps = 30 x 746 = 55950 = 55950/ 1.73 x 415 x .87 x .87 = 55950/550 = 101 amps. The electrical code states that a motor conductor has to be rated at 125% of the motors full load amperage. 101 x 125% = 126 amps A #2 copper conductor with an insulation factor of 90 degrees C is rated at 130 amps. Fusing for this motor will be, non time delay fuse 300 amps, time delay fuse 175 amps or a circuit breaker rated at 250 amps.
Can I put a 40amp 2pole breaker on a 1 horse power well pump I am using?
No, the breaker size is too big. A 1 HP, 230 volt motor draws 8 amps. The electrical code recommends for a motor with a full load amps of 8 amp that it use either 25 amp non time delay fuse, 15 amp time delay fuse or a 20 amp two pole breaker. These sizes will work up to 11 amp full load amps.
