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Old 08-10-2011, 10:50 PM   #1
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Green wire caps with hole in it


Regarding the green cap with a hole in it, can I use this when pigtailing grounds leaving one of them long so that it can connect to the terminal instead of using an additional wire in the pigtail?

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Old 08-10-2011, 11:19 PM   #2
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Green wire caps with hole in it


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Regarding the green cap with a hole in it, can I use this when pigtailing grounds leaving one of them long so that it can connect to the terminal instead of using an additional wire in the pigtail?
I don't see why not (although I've never seen such caps). As long as the connection is tight (pull on each wire after it is installed).

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Old 08-10-2011, 11:40 PM   #3
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Green wire caps with hole in it


I believe that's their intended purpose. I have a bag of them laying around, though I admit that I've never gotten around to using them. I found them somewhat inconvenient that the entire length of the wire had to be bare 14g, when I was pulling runs of green THHN.
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Old 08-11-2011, 01:23 AM   #4
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Green wire caps with hole in it


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Originally Posted by Drliebs View Post
Regarding the green cap with a hole in it, can I use this when pigtailing grounds leaving one of them long so that it can connect to the terminal instead of using an additional wire in the pigtail?
AFAIK, that's the only thing you can do with them. That's what they're for.
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Old 08-11-2011, 04:07 AM   #5
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Green wire caps with hole in it


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AFAIK, that's the only thing you can do with them. That's what they're for.
I'm in the process of retrofitting grounds to all outlets (and later switches) in my home. They all collect in a single junction box, and I had considered using these.

I decided to just use a bunch of regular wire nuts instead.
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Old 08-11-2011, 04:08 AM   #6
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Green wire caps with hole in it


Is there any reason why grounds originating on different circuits should not be connected? They all go back to the same bar, so I don't see any reason why not, but wanted to be sure.
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Old 08-11-2011, 05:28 AM   #7
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Green wire caps with hole in it


all grounds should always be put together. neutrals are to be kept separate
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Old 08-11-2011, 07:07 AM   #8
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Green wire caps with hole in it


They can also be used with nothing sticking out the small end.

A few other tricks:

If you need two ground pigtails you can cut one 12 inch piece of bare wire instead of two 6 inch pieces and you insert the 12 inch pigtail halfway through the green wire nut and then screw it onto the remaining wires.

If you have too many ground wires to go into one wire nut and one ground wire is long enough, put the latter through the large end and out the hole (at least 2 inches showing) and screw some of the wires under that wire nut. Add a second green wire nut on the end sticking through the first wire nut to connect more ground wires, etc.

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