The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
Would ELV branch circuits be a good idea?
by gfretwell
Yesterday at 11:48 AM
100% breakers?
by gfretwell
01/14/17 08:10 PM
Forum Software Upgrade coming soon...
by Trumpy
01/14/17 07:11 PM
Faricating Guards out if Lexan?
by Trumpy
01/14/17 07:09 PM
Dangerous DIY Advice
by Potseal
01/12/17 09:52 AM
New in the Gallery:
Desk-mounted "power-board"
Shout Box

Top Posters (30 Days)
HotLine1 15
gfretwell 11
ghost307 10
sparkyinak 10
Trumpy 8
Who's Online
1 registered (geoff in UK), 255 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#39090 - 06/08/04 07:11 PM Isolated ground runs.
Sandro Offline
Member

Registered: 12/30/01
Posts: 449
Loc: Stoney Creek, ON, Canada
Do I need to run a separate ground from the panel to EACH isolated ground receptacle, or can I run a single insulated ground conductor from the panel and stop off at each junction box and pick up each IGR at each station JB? Is there a limit to how many IG I can pick off of a single line?

Top
Work Gear for Electricians and the Trades

Work Gear for Electricians and the Trades
Work Gear for Electricians and the Trades
Arc Flash Clothing, Gloves, KneePads, Tool Belts, Pouches, Tool Carriers, etc. etc....

#39091 - 06/08/04 08:14 PM Re: Isolated ground runs.
twh Offline
Member

Registered: 03/11/04
Posts: 899
Loc: Regina, Sask.
In Canada, see rule 10-906(9)

Top
#39092 - 06/09/04 12:26 AM Re: Isolated ground runs.
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: North Attleboro, MA USA
It is up to you and the job specifications.
_________________________
Bob Badger
Construction & Maintenance Electrician
Massachusetts

Top
#39093 - 06/09/04 02:10 PM Re: Isolated ground runs.
Radar Offline
Member

Registered: 04/30/04
Posts: 349
Loc: Los Angeles, CA
IG doesn't mean dedicated ground for each outlet. As Iwire says, check your specifications. Generally it means a separate isolated and insulated grounding wire besides the equipment grounding conductor.

So, for a 120V outlet, one would end up with a hot, a neutral, an equipment ground (for the conduit & outlet box), and an isolated ground (for the ground prong of a receptacle).

You can usually string several IG outlets together without a problem, depending on specifications. However, some engineers and/or specifiers have different ideas about what IG means.

Lastly, if the breaker panel feeding your circuit does not have an IG bus with an upstream isolated ground conductor back to the main, are you really getting an isloated ground?

Radar
_________________________
There are 10 types of people. Those who know binary, and those who don't.

Top


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals