ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#37382 - 04/26/04 11:14 PM cw vs. ccw
rizer Offline
Member
Registered: 01/03/04
Posts: 91
Loc: bradenton ,fl.,usa
I have been told the way to determine wether a motor is spinning clockwise or counter clockwise is to look at it from the back of the motor ( the opposite side of the output shaft). Is this correct?
I apologize i'm not in the correct section of this forum. I also noticed iI cannot delete it to put it in the "general discussion" section.

[This message has been edited by rizer (edited 04-27-2004).]
Top
Work Gear for Electricians and the Trades
#37383 - 04/26/04 11:40 PM Re: cw vs. ccw
stamcon Offline
Member
Registered: 03/24/01
Posts: 329
Loc: So San Francisco CA
Rizer, my experience is just the opposite. Look at the end of the shaft for direction(VFSE). If the motor is double shafted, look at the end with the leads(VFLE). Some manufacturers might use the opposite of this, but this is the only way I've seen them.


steve
Top
#37384 - 04/27/04 03:37 PM Re: cw vs. ccw
walrus Offline
Member
Registered: 07/25/02
Posts: 680
Loc: Bangor Me. USA
The motors I've ordered have been tagged cw or ccw on the shaft end. Its my experience that you look at the shaft from the shaft end to determine rotation. My experience is strickly fractional hp if that makes a difference?
Top
#37385 - 04/27/04 04:18 PM Re: cw vs. ccw
maintenanceguy Offline
Member
Registered: 12/02/01
Posts: 300
Loc: Southern NJ, USA
rotation is looking at the shaft end unless otherwie noted. I've never seen it otherwise noted.
Top
#37386 - 04/27/04 04:22 PM Re: cw vs. ccw
frenchelectrican Offline
Member
Registered: 02/06/03
Posts: 939
Loc: Wi/ Paris France { France for ...
shaft end for electric motors otherwise noted or specal installaments.

btw most engines [ gas and diesel engines] are set up by looking at the flywheel arrangement [ most engine run ccw set up but few do run in cw so just like electric motor just watch out that all ]

merci , marc
_________________________
Pas de problme,il marche n'est-ce pas?"(No problem, it works doesn't it?)

Top
#37387 - 04/27/04 06:44 PM Re: cw vs. ccw
rizer Offline
Member
Registered: 01/03/04
Posts: 91
Loc: bradenton ,fl.,usa
thanks for the answer and i'm glad i asked. the superintendant and the general formen both said the exact opposite .but, i'd heard different.
Top
#37388 - 04/27/04 08:05 PM Re: cw vs. ccw
Bjarney Offline
Moderator
Registered: 04/10/02
Posts: 2527
Loc: West-Southern Inner-Northeast ...
I believe NEMA Standard MG1 used to define rotation of small- and medium-sized motors and generators as “viewed [ODE] opposite the drive end” but MG1-2002(condensed) seems quiet on the matter. IIRC, NEMA standards never defined a particular rotation for a given phase sequence.
Top
#37389 - 04/27/04 08:21 PM Re: cw vs. ccw
Attic Rat Offline
Member
Registered: 12/14/03
Posts: 524
Loc: Bergen Co.,N.J. USA
...Rizer, if you're still "fuzzy" about this, call an electrical motor repair shop,..where they do rebuilding,rewinding,servicing, etc,..and ask one of the techs there...
Russ
_________________________
.."if it ain't fixed,don't break it...call a Licensed Electrician"
Top
#37390 - 04/28/04 02:00 AM Re: cw vs. ccw
rizer Offline
Member
Registered: 01/03/04
Posts: 91
Loc: bradenton ,fl.,usa
thanks guys I think that about covers it! I appreciate it.
Top

Member Spotlight
Member Since: 08/22/05
Posts: 44
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 80 Guests and 8 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
KrmtFrg, Stack, Scotto, Freecrowder, clee512

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals