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For calculations of motors the code book states that a 1.5 HP motor draws 10 amps. For correct sizing the motor's nameplate amperage should be used.
Using 10 amps, 30 amp non time delay fuse, 15 amp for time delay fuse, or 25 amp for breaker. A #10 copper conductor with an insulation factor of 90 degrees C should be used on this amperage.
What else can I help you with?
What size main breaker feeding 480v 75 kva transformer?
An exact breaker size can not be given because the voltage, and hence the calculation for current, is not given. A transformer shall be protected by an over current device that is not rated at more that 150% of the primary current.
What size breaker for a 20 horse power motor with 3 phase 208 volts?
For a 20 horsepower motor with 3-phase 208 volts, you would typically use a 70 amp circuit breaker to protect the motor and wiring. This calculation is based on the full load amp (FLA) rating of the motor, which for a 20 HP motor at 208 volts typically falls around 70 amps. It's important to consult the motor's technical specifications and local electrical codes to ensure proper breaker sizing.
How do you find out how big your main breaker box is?
You can determine the size of your main breaker box by looking at the number of circuits it can handle. A typical residential main breaker box is usually 100 amps, 150 amps, or 200 amps. You can also check the label on your breaker box or consult with an electrician for assistance.
What size run and start capacitors do you need for 3450 rpm 240 Volt 23.5 Amp k56a46b23 ao smith compressor motor?
For a 3450 RPM, 240 Volt, 23.5 Amp A.O. Smith K56A46B23 compressor motor, a typical run capacitor size would be around 30-35 µF, while a start capacitor might be in the range of 100-150 µF. It's important to ensure that the voltage rating of both capacitors is at least 250 volts to handle the electrical load safely. Always verify the specific requirements in the motor's manual or consult with a professional for precise specifications.
What size of wire and breaker do you need for a 10 KW electric furnace?
To answer this question, wire size is rated in the amount of amperage that it can legally carry. 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 = 10 x 746 = 7460 = 7460/1.73 x 220 x .84 x .86 = 7460/275 = 27.1 amps. The electrical code states that a motor conductor has to be rated at 125% of the motors full load amperage. 27.1 x 125% = 33.8 A #8 copper conductor with an insulation factor of 60, 75 or 90 degrees C is rated at 40, 50 and 55 amps respectively.
What is the Largest amperage single phase 120 volt breaker made?
6000amps <<>> The above answer must have big lugs to accommodate 6000 amp capacity wire. In my breaker catalogue the largest 120 volt single pole breaker is 70 amps, 277 volt single pole is 150 amps and 347 volt single pole is 100 amps. The 120 volt single pole breaker occupies two opposed slots because of its length.
What is the recommended size for the main breaker in a residential electrical panel, specifically for a 125 amp main breaker?
The recommended size for a main breaker in a residential electrical panel with a 125 amp main breaker is typically 150 amps.
What size wire and breaker for a 3 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 size of outboard motor for a 19 ft dusky?
175/150
What wire size 240 volt 21 amps 150 foot run?
A #10 copper conductor will limit the voltage drop to 3% or less when supplying 21 amps for 150 feet on a 240 volt system.
What is the maximum current capacity of a 150 amp breaker?
The maximum current capacity of a 150 amp breaker is 150 amps.
What size wire would you need for 150 amp breaker?
# 1 awg if in Canada not sure about us codes
What size main breaker feeding 480v 75 kva transformer?
An exact breaker size can not be given because the voltage, and hence the calculation for current, is not given. A transformer shall be protected by an over current device that is not rated at more that 150% of the primary current.
What is the maximum amperage capacity of a 150 amp circuit breaker?
The maximum amperage capacity of a 150 amp circuit breaker is 150 amps.
What size breaker for a 3 phase 460 volt 50 hp motor?
Breakers are sized by the conductors that are connected to them. Conductors are sized by the amperage that the load draws. The electrical code states that a 50 HP 460 volt three phase motor draws 65 amps. The ideal amperage would be taken from the motors nameplate as different motors of the same horsepower will have different amperage's depending on what they are designed to do. The feeders for this motor have to be sized at 125% of the motors full load amperage. 65 x 125% = 81 amps. A #4 copper conductor with and insulation rating of 75 or 90 degrees C is rated at 85 amps. The breaker for this motor is 150 amp or 175 amp fusing or 110 amp time delay fusing.
What is the maximum amperage capacity of the main breaker in the electrical panel, specifically looking for a 150 amp main breaker?
The maximum amperage capacity of a 150 amp main breaker in an electrical panel is 150 amps.
What is the maximum current capacity of the circuit breaker rated at 150 amp?
The maximum current capacity of a circuit breaker rated at 150 amps is 150 amps.
