ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
How's all our Non-US folks doing?
by djk - 07/23/21 09:13 PM
Switched Receptacles -Top or Bottom?
by donles - 07/23/21 10:51 AM
Do You Travel?
by Bill Addiss - 07/20/21 04:26 PM
Backup Generator Done Right
by timmp - 07/18/21 12:20 PM
Square D "All-In-One" Panelboard
by Rachel - 07/16/21 04:57 AM
New in the Gallery:
OOPSIE!
OOPSIE!
by timmp, July 13
AT&T Office Thermostat, Summer
AT&T Office Thermostat, Summer
by timmp, July 13
Who's Online Now
0 members (), 9 guests, and 16 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#87932 05/04/04 07:33 PM
Joined: Feb 2004
Posts: 5
E
EvanH Offline OP
Junior Member
When wiring industrial 3-phase motors, common practice as I've seen it has been to use wirenuts to connect leads to incoming power wires, and tape them off.

I recently received an IEEE-841 style motor, that has ring terminals on the motor leads. Is there some expectation or regulation that I must use some other kind of wire connection?

Does anyone know a reason I can't just snip off the ring terminals and use the wirenut technique?

Thanks,
Evan

2017 / 2014 NEC & Related Books and Study Guides
#87933 05/05/04 12:33 AM
Joined: Apr 2002
Posts: 2,527
B
Moderator
Page 19 for MSC-series motor-stub splice. Though there may be local variations, bolted connections in motor j-boxes are fairly universal. http://tnbelectricalworld.tnb.com/contractor/docs/shrinkon.pdf

In some plants, non-bolted splices are a “dismissible” offense. Given IEEE-841 motors are Petroleum and Chemical—Severe Duty, bolted connections are likely a default requirement.




[This message has been edited by Bjarney (edited 05-05-2004).]

#87934 05/05/04 09:42 PM
Joined: Feb 2004
Posts: 5
E
EvanH Offline OP
Junior Member
Thanks for the response, and the splice insulator reference.

So for the splice itself, I put a similar ring terminal on my power conductor, and just use any bolt and nut that are the right size to fit through the ring terminals?

#87935 05/05/04 11:53 PM
Joined: Apr 2002
Posts: 2,527
B
Moderator
It may be best to use the existing ring terminal to size the machine bolt and ring terminal for external wiring. The T&B MSCs list a maximum bolt length. Zinc-plated steel hardware with star lockwashers have worked well for me.


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
electure
electure
Fullerton, CA USA
Posts: 4,287
Joined: December 2000
Top Posters(30 Days)
Rachel 4
timmp 4
Popular Topics(Views)
281,394 Are you busy
215,036 Re: Forum
201,920 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5