ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
diazed fuses
by annemarie1. 02/24/18 08:05 PM
Solid state relay or not
by gfretwell. 02/24/18 04:52 AM
Whirlpool Recalls KitchenAid Electric Kettles
by Admin. 02/22/18 11:35 AM
110.26
by gfretwell. 02/18/18 12:14 AM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 3 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Bonding Service Equipment Raceways #162804
04/25/07 07:48 PM
04/25/07 07:48 PM
R
roninblayd  Offline OP
Junior Member
Joined: Mar 2007
Posts: 2
Illinois
Someone Please help clarify whether all metal raceways at the service equipment/panel have to be bonded to the grounded conductor or if it is only the raceways containing the service conductors. Double locknut bonding is not acceptable for the service raceways but is it acceptable for the branch raceways at the service equipment? Hard to interpret the code on this mattter. Thanks for any help.

Work Gear for Electricians and the Trades
Re: Bonding Service Equipment Raceways [Re: roninblayd] #162810
04/25/07 08:11 PM
04/25/07 08:11 PM
G
gfretwell  Offline

Member
Joined: Jul 2004
Posts: 9,182
Estero,Fl,usa
You bond service raceways to the "grounding" conductor. This is a different application than feeder and branch circuit raceways. That is why we have extra bonding requirements. Service conductors basically are not protected against overcurrent. The same fault that would trip a breaker on a feeder will just sit there and cook on a service conductor until the primary fuse on the transformer opens or the transformer blosw.


Greg Fretwell
Re: Bonding Service Equipment Raceways [Re: gfretwell] #162817
04/25/07 08:34 PM
04/25/07 08:34 PM
R
roninblayd  Offline OP
Junior Member
Joined: Mar 2007
Posts: 2
Illinois
I accept your reasoning but the NEC states that the service raceways be bonded to the "grounded conductor" or through other acceptable means per 250.92. --standard locknuts not being allowed as sole means for the bonding requirement, but my question is also in reference to 250.130(A) where {all}the equipment grounding conductor at service equipment(branch metal raceway) is required to be bonded to the grounded service conductor and the GEC (acceptable bonding means per 250.96 superceded by 250.92(b)). I have to conclude that standard locknuts are not allowed as sole means for bonding at the service equipment for any metal raceways.


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
watersparkfalls
watersparkfalls
Washington...Not DC
Posts: 222
Joined: March 2005
Show All Member Profiles 
Top Posters(30 Days)
Admin 9
Popular Topics(Views)
244,084 Are you busy
181,127 Re: Forum
171,323 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.017s Queries: 15 (0.003s) Memory: 0.9510 MB (Peak: 1.0767 MB) Zlib enabled. Server Time: 2018-02-25 15:39:27 UTC