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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.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoUsually you work this out by taking your power which is 15kw = 15,000 watts divided by the voltage, which im presuming is 400 volts. This equals your amps. 37.5 amps is a rough estimation. It all depends though on the type of cable and the distance, so you were taking that 50 metres? Id use 10mm Steel wired armour cable. Because your distance reduces the current it could carry. Speak to someone in an electrical wholesalers, they'll ask what your using it for etc and advise you the best cable size and type.
Wiki User
∙ 12y agoTo answer this question the voltage and current is needed.
Wiki User
∙ 11y agoDepends on the voltage. Say its 400 volts. You would only be pulling under 10 amps. 2.5mm would be nice and safe.
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How many amps does a 2 hp 240 volt single phase motor draw?
One horsepower electric is defined as 746 watts, so two horsepower is 1492 watts. Divide that by 240 volts, and you get about 6.2 amperes. Now you have to consider the power factor, which is the ratio of apparent power to true power, caused by the inductive (reactive) load of the motor causing the current to be out of phase with respect to voltage. You did not say what the power factor was, so lets assume it is 0.8. That makes the current about 7.75 amperes.That's running current, at full load. Starting current is often four times higher. The NEC list this motor has drawing 12 amps and to wire this motor you would use this value, unless the actual nameplate amps on the motor was higher.
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