To answer this question the pump's voltage is needed.
A 10 hp pump operating at 480 volts would draw approximately 15.6 amps of current. This can be calculated by dividing the power in watts by the voltage.
100 amps
Assuming the power factor is 1, a 10 hp motor operating at 600 volts in a three-phase system would draw approximately 13.33 amps.
A 1-HP motor is reckoned to draw 7 amps at 240 v single-phase. The same power of motor would draw 3.5 amps at 480 v single-phase, but a 480 v supply could most likely be a three-phase suppy, and the current in that case would be reckoned as 2 amps.
Since one horsepower is 745 watts, a 115 volt 1 hp motor would pull about 6.5 amperes, depending on power factor.Note:That may be a theoretical value. However, practically speaking, single phase A.C. motors are notoriously inefficient. That is the reason the National Electrical Code lists the full load current of a 1 HP, 115 volt motor at 16 amps. That value is considered nominal and can vary depending on motor design. That value does not begin to factor in inrush current.The best advice is to utilize the manufacturer's motor nameplate value.
A 10 hp pump operating at 480 volts would draw approximately 15.6 amps of current. This can be calculated by dividing the power in watts by the voltage.
100 amps
To answer this question the voltage of the motor must be stated.
A single phase 10 HP motor will draw aproximately 50 amps. A three phase 10 HP motor will draw aproximately 28 amps.
It depends on the voltage-- I think at 110v it's 4 amps per hp
Assuming the power factor is 1, a 10 hp motor operating at 600 volts in a three-phase system would draw approximately 13.33 amps.
24.87amps 1 hp=746 watts P=IxV ... (746x8)/240
For a 1.5 hp 230v 3 phase motor, you can calculate the amperage using the formula: Amps = (HP x 746) / (Volts x Efficiency x Power Factor x √3). Assuming an efficiency of 0.85 and a power factor of 0.8, the amperage draw would be approximately 4.3 Amps.
HP = (Current x Voltage)/746, or HP = (IE)/746 (disregarding %Efficiency) So, you have to solve for I, current: I = (746 x HP)/E
1 HP = 745.70 wattsPower (watts) = Current (amps) x VoltsSo if you use a 110 volt system, amps = 745.7/110 = 6.779 ampsIf you use a 220 volt system, amps = 745.7/220 = 3.389 ampsFor a 12 volt system, amps = 745.7/12 = 62.142 amps
Look at the motor nameplate and it shoud have the amp draw on it. If the nameplate is missing, then the amp draw depends on what type of motor it is. The basic calculation to get you in the ball park would be as follows: 1 HP = 0.75 KW 7.5 HP = 5.63 KW Assume the efficiency of the motor is 80%, then the power supplied will need to be 5.63/0.8 = 7.04 KW amp draw = 7040/220 = 32 amps <<>> For calculation purposes the electrical code book states that a 7.5 HP motor draws 40 amps.
read the name plate on the motor