ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Lock-down Thread
by HotLine1 - 05/10/21 02:32 PM
Do You Travel?
by HotLine1 - 05/10/21 02:17 PM
Any Woodworkers here?
by Trumpy - 05/10/21 07:22 AM
Your favourite food?
by Trumpy - 05/10/21 07:07 AM
Just be aware of this...
by Trumpy - 05/10/21 06:47 AM
New in the Gallery:
2020 - 2021 Winter Project
Garden 2021
Who's Online Now
0 registered members (), 24 guests, and 15 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Motor Lead Termination #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
Re: Motor Lead Termination #87933 05/05/04 12:33 AM
Joined: Apr 2002
Posts: 2,527
B
Bjarney Offline
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).]

Re: Motor Lead Termination #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?

Re: Motor Lead Termination #87935 05/05/04 11:53 PM
Joined: Apr 2002
Posts: 2,527
B
Bjarney Offline
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.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

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

 

Member Spotlight
BEAMEUP
BEAMEUP
WA
Posts: 27
Joined: December 2004
Show All Member Profiles 
Top Posters(30 Days)
Trumpy 19
Admin 8
Popular Topics(Views)
278,806 Are you busy
211,972 Re: Forum
199,009 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3