ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Burning out of return(white) side of 120volt rec
by crselectric. 06/14/19 02:15 AM
Video door bell causing chime activation of coil
by JoeTestingEngr. 06/13/19 12:43 PM
Troubleshooting Voltage Drop Across Relay
by gfretwell. 06/09/19 11:49 AM
Apple Recalls Three-Prong Wall Plug Adapters
by Admin. 06/05/19 09:06 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 13 guests, and 19 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Bx Casing #44514
11/05/04 10:03 PM
11/05/04 10:03 PM
S
Sparks30  Offline OP
Member
Joined: Mar 2002
Posts: 125
Connecticut.usa
Can you use the casing of the BX for a ground? I have seen this done in old house, but I never thought it was legal. Thanks

Work Gear for Electricians and the Trades
Re: Bx Casing #44515
11/05/04 10:10 PM
11/05/04 10:10 PM
D
dmattox  Offline
Member
Joined: Oct 2004
Posts: 265
Anaheim, CA
Don't think so, isnt that why they made MCC?

Re: Bx Casing #44516
11/05/04 10:22 PM
11/05/04 10:22 PM
D
Dave55  Offline
Member
Joined: May 2004
Posts: 697
Crystal Lake, Illinois, USA
To be a little technical the BX I use is Type AC. The casing is suplimented with an internal bonding strip. See Article 320.100 and 320.108. There's also a cross-reference in Article 250.118.

Dave

Re: Bx Casing #44517
11/05/04 11:37 PM
11/05/04 11:37 PM
E
ElectricAL  Offline
Member
Joined: Oct 2001
Posts: 597
Minneapolis, MN USA
Sparks30,

Since you are thinking of installations of BX you've seen in old dwellings, the history of local ordinance as applied by the electrical Authority Having Jurisdiction since the dwelling was built is what determines whether a particular run of BX is allowed to be used as a ground.

The current NEC is for new installations, as a general rule. The NEC will have bearing on modification of existing wiring in sometimes strange ways.

In my area, old BX (without drain wire) is grandfathered in as a grounding means if the BX is apparently installed to the codes that were in effect at the original time of install. I can replace a two wire receptacle with a grounded receptacle. . .if, and this is a big if, the box volume calculates.

Many, but not all, times it is something else that drives the total replacement of the BX.


Al Hildenbrand
Re: Bx Casing #44518
11/07/04 06:38 AM
11/07/04 06:38 AM
S
Sparks30  Offline OP
Member
Joined: Mar 2002
Posts: 125
Connecticut.usa
Thanks for the replys. Just wondering what other people think. Thanks again


Featured:

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

 

Member Spotlight
Radar
Radar
Los Angeles, CA
Posts: 349
Joined: April 2004
Show All Member Profiles 
Top Posters(30 Days)
Khombo 2
Popular Topics(Views)
255,717 Are you busy
191,687 Re: Forum
181,470 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.023s Queries: 14 (0.005s) Memory: 0.9668 MB (Peak: 1.1063 MB) Zlib enabled. Server Time: 2019-06-17 16:58:18 UTC