ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Violation?
by HotLine1 - 01/19/23 09:10 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
AFDD's coming to the UK
by Texas_Ranger - 01/17/23 07:22 PM
Circuit Breaker Lube
by renosteinke - 01/14/23 06:40 PM
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
1 members (Scott35), 32 guests, and 21 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#215142 03/08/15 05:19 PM
Joined: Apr 2002
Posts: 195
T
triple Offline OP
Member
Are steel bushings allowed on rigid pipe terminations for conductors #4 or larger? 300.4(G) appears to say no. When used on smaller conductors, is the steel bushing listed for use without a locknut inside the box?

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
 

triple #215143 03/08/15 05:41 PM
Joined: Apr 2002
Posts: 195
T
triple Offline OP
Member
Also, even though it is not stated in 352.46, I would assume steel bushing would not be allowed on PVC due to a lack of connection to ground. And to be clear, I am refurring to standard/non bond bushings in these post. The Handbook shows bond bushings being used without locknuts so it is probably safe to assume that doesn't violate their UL Listing.

triple #215144 03/08/15 06:53 PM
Joined: Dec 2000
Posts: 4,291
Member
Sure they're allowed ..... as long as they have an insulated throat.

[Linked Image from s3.amazonaws.com]

triple #215149 03/10/15 07:46 PM
Joined: Jan 2005
Posts: 5,369
Likes: 1
Cat Servant
Member
Where is it written that they must have plastic throats?

The current Steel City catalog shoes several styles of metal bushings. Some are zinc and some are iron. Several do not have any sort of liner. All show a current UL listing.

Or ... are these another 'forbidden fitting" to add to the other thread?

triple #215152 03/11/15 08:19 AM
Joined: Dec 2000
Posts: 4,291
Member
300.4(G)
Insulated Fittings. Where raceways contain 4 AWG or larger insulated circuit conductors, and these conductors
enter a cabinet, a box, an enclosure, or a raceway, the conductors shall be protected by an identified fitting providing a smoothly rounded insulating surface, unless the conductors are separated from the fitting or raceway by identified insulating material that is securely fastened in place.


They could be listed if they're not intended to put conductors #4 or larger in the conduit.

triple #215159 03/11/15 07:36 PM
Joined: Jan 2005
Posts: 5,369
Likes: 1
Cat Servant
Member
Well, that's enough to keep them from my 'illegal fittings' thread!

To be fair, I've only seen the metal bushings on 3/4 and 1/2 pipe. Not much room for big wires there! Plus, they've all been older jobs, quite possibly from the days before plastic.


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
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Top Posters(30 Days)
BigB 9
Popular Topics(Views)
302,338 Are you busy
231,740 Re: Forum
216,365 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5