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garyoutwest 01-03-2009 04:32 AM

Ground Wires
 
I'm going to add some circuits around the house. In the past, to tie together ground wires in the boxes, I've always used wire nuts, but in all the new construction I've seen the real electricians use crimps.

Is there any reason (code-wise or other) that the crimps are a better way to go? Being a tool collector, I don't mind buying the right crimp tool if that way is really superior, but is it?

Thanks...

Gary

Just Bill 01-03-2009 06:40 AM

Probably time/expense, wire nuts still OK. Grounds must be tied together, grounded to the box(if metal), and connected to the ground bond on the device strap. Greenies work just fine for this, leave one long ground thru the hole.

Above all we say here, local code always rules.

J. V. 01-03-2009 01:47 PM

Either method is fine. Crimping is just finer.

220/221 01-03-2009 03:03 PM

Crimping is for production work. A crimp is cheaper than a wire nut and the connection takes up a little less space in most cases as you don't have extra pigtails in there. Labor wise, not much difference.

I never use crimps. If I did production work, I would.

AndrewF 01-03-2009 10:01 PM

I've always used wirenuts, although now I am going to start using green wire nuts on future products.

220/221 01-03-2009 11:59 PM

I don't see much of a point to the green nuts. Just one extra thing to stock/carry for very little return.

Steelhead 01-04-2009 12:37 AM

I don't care for the crimps because if you have to add a circuit or whatever and you need to connect the ground its a royal pain to deal with. I think this may convince some diyers/homeowners to not connect the ground because of the trouble.

Bob Mariani 01-04-2009 07:10 AM

crimps are used to allow more space in the box. More space more free air less heat better job. Wirenuts are allowed. BUT only green ones., Read the code Ohio. I use both. I have both at hand. And we never construct anything..especially in electrical work so that it can come apart easily. Ease of access yes... To undo a crimp simply squeeze with your Kliens across the crimped section and twist and pull. All electrical work is designed for safety not for ease of use by a DIY or HO.

InPhase277 01-04-2009 09:24 AM

Quote:

Originally Posted by Bob Mariani (Post 206565)
Wirenuts are allowed. BUT only green ones., Read the code Ohio.

Then this applies to ohio only, and even then I find it suspect.

chris75 01-04-2009 10:25 AM

Quote:

Originally Posted by InPhase277 (Post 206644)
Then this applies to ohio only, and even then I find it suspect.

Me too!

Bob Mariani 01-04-2009 10:50 AM

no my comment was to the guy in Ohio. It is a NEC code everywhere. I have contractor licenses for electrical in 12 states. It is amazing how some areas twist things. In CT we need insulated stables of Rmx... Baltimore we did not. Every where in the country you drive ground rods with a sledge hammer but in LA you cannot even hit it, they claim it will completely and permantly magnitise the rod making it ineffective. (Duh?) State inspectors there have a 2nd grade education at best I guess. main issue with grounding wires ... they must have a secure connection. Twisting them together only is not acceptable.

Matsukaze 01-04-2009 12:27 PM

The NEC does not require green wirenuts. There may be a local amendment that does, or an inspector may misinterpret the code, but this is not an NEC requirement. See this IAEI article (scroll down to question #8) or this thread from Mike Holt's site for all the gory details about the code requirements and the various UL listings involved. In short, you can use either either a regular wirenut or a Greenie for the ground wires, but the Greenie may not be used for any other purpose.

Bob Mariani 01-04-2009 01:48 PM

read your references.. very informative indeed. Also explains the confusion here. And also explains what I posted. Many areas want to follow the code in so much as all items make specifically to connect these ground wires are green or bare. As are the wires themselves. This coupled with the term in the code "greenies" easily being construed to mean these green wire nuts. Even Ideal and others in your refereneces say so. But... what I said is that check you local codes and I feel that anything making a solid connection should be okay.

AndrewF 01-04-2009 02:26 PM

I had no specific reason for saying I would use greenies other than I didn't want to use a crimp and having a bin of greenies is no big deal to me for any of my DIY projects.


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