ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Underground phone and coax depth?
by libellis - 02/08/23 08:38 PM
Al Hildenbrand - Minneapolis - obituary
by Bill Addiss - 02/03/23 07:38 PM
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 23 guests, and 18 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Joined: Jan 2005
Posts: 91
H
Member
Are any of you using type S/O cable to supply fixed electric motors in an industrial setting? I believe that this is allowed under 400.7 Uses Permitted (7) Prevention of the transmission of noise or vibration.

We have several 25 to 125 HP motors that repeatedly rub through the conductor insulation in the flexible conduit near the motor. Am considering replacing the last few feet of conduit and wire to a Type S/O or perhaps even a type W flexible cable.

Stay up to Code with the Latest NEC:


2020 NEC & Related Reference & Study Guides
2020 NEC & Related Reference & Study Guides
Pass Your Exam the FIRST TIME with these Exam Prep Combos:
 

>> Master Electrician Exam Prep     >> JourneyMan Electrician Exam Prep
 

Joined: Jun 2004
Posts: 1,273
T
Member
http://www.meltric.com/html/specification-guide.html

Meltric has a scheme dialed in for industrial motors.

Though not well shown in Meltric's photos, their device is obviously suitable for strain relief modification/ enhancement.

Other NEMA players have directly competing products -- and all should be examined.

Hubbell makes a slew of Kellums style strain reliefs -- suitable for SO cord -- and much more.

Strain relief can be added on to Sealtite whips, too.

Additional possibilities:

Use Sealtite angled fittings -- angled at 45 degrees, that is.

These can kick the passage of a whip clear of trouble -- where a straight or 90 did not.


Last edited by Tesla; 04/03/15 05:09 PM.

Tesla

Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

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

 

Member Spotlight
Grover
Grover
Sebago, ME, USA
Posts: 109
Joined: January 2005
Top Posters(30 Days)
triple 2
Popular Topics(Views)
303,310 Are you busy
232,267 Re: Forum
217,023 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5