ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
twh 10
Admin 4
Recent Posts
Correct rotation, wrong sequence
by Potseal. 05/27/17 12:15 AM
Dryer, Range grounding from "Main" panel
by sparkync. 05/25/17 05:49 PM
210.70 / Wall Switch / When adopted?
by gfretwell. 05/24/17 09:18 PM
Any UL 508 experts out there?
by sparkyinak. 05/23/17 11:04 PM
Heat pump conundrum
by sparkyinak. 05/21/17 08:49 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
236,873 Are you busy
171,875 Re: Forum
164,783 Need opinion
Who's Online Now
0 registered members (), 67 guests, and 10 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#9925 - 05/21/02 01:09 PM Strain relief on drop cords.  
Joe Carpenter  Offline
Member
Joined: Dec 2001
Posts: 50
USA
In an industrial setting. 30amp 480volt Flexible Drop cords to supply power to machinery. These Cords must have Strain relief at the top.
My question, must the twist lock plugs which are located 6' off the floor also have special strain relief built in?
400.10 in the 2002 NEC does not go into a lot of detail.
What's your take?
Thanks


Work Gear for Electricians and the Trades

#9926 - 05/21/02 10:33 PM Re: Strain relief on drop cords.  
rmiell  Offline
Member
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
Joe, are you asking if the female end of the hanging cord needs strain relief? What strain would be imposed on the cord cap? Just the 6' cord from the unit?

I would think the strain relief on top will protect the cord from damage while hanging. The twist-lock plug and cap will not have much strain, at least not enough to damage anything.

What's your thoughts on this?

Rick Miell


#9927 - 05/22/02 06:24 AM Re: Strain relief on drop cords.  
Joe Carpenter  Offline
Member
Joined: Dec 2001
Posts: 50
USA
Yes, that was my question. I did'nt think it would be an issue although I recalled seeing strain reliefs on the female plug in several factories. It may have been a policy within the factory or perhaps the local AHJ specified them.


#9928 - 05/22/02 06:36 AM Re: Strain relief on drop cords.  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
I have seen strain relief where an outlet box was hung at the bottom of the cord drop. But I imagine the cord caps clamp would be adequate in your case.



Member Spotlight
Lostazhell
Lostazhell
Bakersfield, CA (Originally Orange Co.)
Posts: 1,429
Joined: February 2004
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.014s Queries: 14 (0.003s) Memory: 0.7589 MB (Peak: 0.8917 MB) Zlib enabled. Server Time: 2017-05-27 13:35:29 UTC