Earthing Between Pump and Motor

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Anonymous Poster #1	Earthing Between Pump and Motor 02/02/2013 11:12 PM
	Dear guru, I have some doubt related with earthing of equipment, Why we have to connect earthing in 2 places for motor and for pump? why not sufficient in motor only or pump only? what the risk if both pump and motor earthed in only in one point? as i understand both are connected through shaft so one earthing point is enough. Please help me
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Earthing Between Pump and Motor 02/03/2013 6:22 AM
	The need arises from the wiring standard applicable in the country of installation, which the forum doesn't know. Reading this standard will remove all doubt, and applying it will remove all risk. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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Anonymous Poster #1	#3 In reply to #1 Re: Earthing Between Pump and Motor 02/04/2013 12:40 PM
	Motor and pump cant be earthed in one point, motor connected to the pump through shaft of rotor. and a rotor is rotating part that can't be solidly grounded with motor body. other reason, if earthing only in one point... in case motor or pump is removed for maintenance. one of these equipment will not be earthed.
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#2 Re: Earthing Between Pump and Motor 02/03/2013 11:05 AM
	Too much is unknown, for an answer. Location, power supplied, codes invoked, customer requirements, pump housing materials of construction, etc. etc. etc. As PWSlack pointed out, not enough information. NFPA/NEC/BS/ISO/IS/ and other standards may apply.
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juan J. Isdray Commentator Join Date: Jan 2013 Posts: 70	#4 Re: Earthing Between Pump and Motor 02/05/2013 3:54 PM
	First of all earthing system shal lbe equipontential equalized to be sure that not arc flash will occur during a short circuit mainly in hazardous installation like chemical industrial or gas station, it only will require from you a short piece of wire additional and you can sleeping quite
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Jinendra Participant Join Date: Feb 2014 Posts: 1	#5 In reply to #4 Re: Earthing Between Pump and Motor 02/11/2014 1:43 AM
	How to connect ground earthing for a pump? Can you use a multicore cable or a single conductor of certain minimum aea is required?
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Anonymous Poster (1); Jinendra (1); juan J. Isdray (1); lyn (1); PWSlack (1)

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