Motor Pump Amperage

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johnmik Participant Join Date: Jan 2012 Posts: 3	Motor Pump Amperage 07/04/2012 2:08 AM
	good day.. I have a 2HP(1.5kw),220volts, 60Hz 3450rpm, single phase electric motor. I want to know What is the rated ampacity of this motor? please give me the exact formulation for this matter. Thank you,
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: MOTOR PUMP amperage 07/04/2012 2:15 AM
	Look on the nameplate.
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 Re: MOTOR PUMP amperage 07/04/2012 2:17 AM
	watts divided by volts equals amps.... __________________ All living things seek to control their own destiny....this is the purpose of life
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BAI Active Contributor Join Date: Dec 2011 Location: Continent Lemuria-(Kumari Kandam)????? Posts: 24	#3 Re: MOTOR PUMP amperage 07/04/2012 6:42 AM
	http://ecmweb.com/nec/motor-calculations
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JRaef Guru Join Date: Sep 2006 Location: California, USA, where the Godless live next door to God. Posts: 4665 Good Answers: 804	#4 Re: Motor Pump Amperage 07/04/2012 8:46 PM
	The *exact* formula is meaningless, it is only slightly better than a SWAG* because no two motors are going to have the EXACT same resistance in the windings, magnetic reluctance in the steel, friction in the bearings, wind resistance in the cooling fans etc. etc. If you are wanting REAL data, read it from the nameplate, it is empirical (meaning it is derived from real world test data by the manufacturer). SWAG = Scientific Wild Ass Guess... __________________ * All I every really wanted to be, was... A LUMBERJACK!.**
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Joe Sparky Power-User Join Date: Jun 2009 Location: New Zealand Posts: 403 Good Answers: 5	#5 Re: Motor Pump Amperage 07/05/2012 2:27 AM
	P = V x I So P/V = I But this will only give you the current at unity power-factor The actual current is going to be greater than 6.8 amps and probably less than 8.5 amps
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brich Guru Join Date: Oct 2009 Location: sometimes Wales,UK.. was Libya, now Oman! Posts: 1715 Good Answers: 117	#6 Re: Motor Pump Amperage 07/14/2012 3:27 PM
	did I hear a "thank you" for doing ones homework??????? __________________ The square root of nothing is what you make it!
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BAI (1); brich (1); Joe Sparky (1); JRaef (1); lyn (1); SolarEagle (1)

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