The current draw is about 27 amps. A motor feeder has to be 125% of the motors full load amperage. 27 x 125% = 33 amps. A #8 copper conductor with an insulation factor of 90 degrees C is rated at 40 amps.
5 kw.
If I consider power factor is 0.85 & motor efficiency is 95% then you have required 4 sq mm wire which is able allow passing 25.47 A current trough it.
The cable size is : 4*25 mm2
yes
I HAVE A 15KW 50Hz 400V VEM MOTOR , I WANT TO RENEWAL THE GREASE
51210 Btu's in 15kw heat strip. 3.414 * 15000= 51210
It depends on more than Wattage or horsepower. In your question, you also need to mention line Voltage, power factor, and whether single or three-phase. Cable size is based on current, so we need to know everything to calculate current.
15 kilowatts is a measurement of electrical power.
15kw
Watts equal amps times voltage, so Watts divided by voltage (120), = 125 amps. With 240 volts, the amperage would be 1/2 or 62.5 amps. Are you referring to a 1500 watt heater? In that case it would be 12.5 amps at 120 volts. watt divided by voltage gives the current in that case it is 15*1000w/240v gives 6.25A when the power factor is unity. I=W/V*pf The above math is wrong. 15kw = 15000 watts. Therefore 15000 / 240 volts = 62.5 amps. If the voltage is 120 volts then the amperage would be 125 amps. For consideration; A 15000 watt generator (15kw), is capable of supplying 125 amps at 120 volts or 62.5 amps at 240 volts.
A 15kw heat strip typically requires a double-pole breaker with a rating of 60 amps. This allows the circuit to handle the high power requirements of the heat strip safely. Make sure to consult the manufacturer's specifications to ensure the correct breaker size for your specific unit.
The wire size is based on the amperage to the load. This is the quick estimate for amps when kilowatts are known, Amps = Watts/Voltage. As you can see the value of the voltage that the generator produces is needed. A #6 copper wire with 90 degree C insulation is rated at 65 amps. The following are exact formula for amps when kilowatts are known. This is a formula for single phase generation, Amps = kW x 1000/Volts x pf. The three phase formula is, Amps = kW x 1000/1.73 x Volts x pf. pf = power factor.