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Wire ferrules in residential wiring

30K views 87 replies 24 participants last post by  MikeFL  
#1 ·
Hi guys, got a quick question. So I have wired up a couple of metal shops on the side. These are “under the table” jobs and don’t require an inspection of any kind but all the work I do, I want to do to NEC code. So being these are metal shop buildings and I am not great at bending metal conduit yet, I have used the gray pvc conduit in the past. I use 12 gauge stranded wire to make pulls easier. My question is, for devices such as receptacles with the wire plug hole in the back, can I use wire ferrules such as these https://www.amazon.com/Ferrule-Crim...-300694470656&keywords=wire+ferrule&qid=1554147473&s=gateway&sr=8-1-spons&psc=1, on devices that only require one or two wires to be connected, rather than using fork terminals? I am wanting to know if this is code compliant, as for me the ferrules are a tad easier to use and are a little cheaper than buying fork terminals. Thanks for any advice as I’m trying to expand my knowledge in the electrical field.
 
#7 ·
If your using #12 stranded wire just use the 14 gauge notch on the stripper. Then it should fit the hole without the ferrule. Just strip it short so the wire doesn’t have the tendency to fold over when you are trying to push it in.

Always use black tape to wrap the plug with.

Are you going to use a fork on the green screw?
 
#12 ·
My question is, for devices such as receptacles with the wire plug hole in the back, can I use wire ferrules such as these
I don't think that he wants to back stab them because he mentioned using forks previously. I think that he wants to use a ferrule underneath the screw for some odd reason.



Imagine the things they'd find if one of these jobs was actually inspected?
I'm with 99 ... backstabbin'
 
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#14 ·
My bad, I thought you were one of the regulars trying out a new screen name to spice the place up. Don’t go by anything I said.

Not even the black tape:vs_laugh:

And I had a nice one in my head for my next response.

Oh well. Don’t get discouraged with the forum. They are looking for new guys to help drive up the posts.
 
#20 ·
Love all the pricks in this forum. Never stated anywhere that I was an electrician, I am learning to be one. I guess none of you ever had questions when you were apprentices and wanted advice from elders who had knowledge in the field. It was a simple question, were they compliant or not. I’m not referring to the holes like on the back of 15 amp receptacles. I was referring to the one that is on the 20 amp receptacles I use, that the same screw that is used to wrap around when using solid wire, also clamps/compresses whatever is in this hole.
I understand most of you are seasoned electricians, but folks like you who give responses like these are keeping the younger generation from getting into the trade. Thanks for the few answers that actually helped me out. All I needed to here was that the correct application for ferrules is not in the residential aspect, but to keep using the fork terminals to terminate on the screw of the receptacles.
 
#24 ·
Because you’re unqualified. I can argue with MTW but that’s okay because we are both licensed, experienced people. You’re not.

An apprentice’s job is to work under the supervision of a journeyman. There’s no room for argument on the subject.

If you were working under a journeyman you wouldn’t be looking for internet advice.
 
#23 ·
Actually, this is no place for an apprentice to ask for advice on a non-permitted side job.

If you’re using devices with compression plates, why would you use ferrule terminations? Makes no sense.

You are clearly out of your element with this work and should stop. Immediately.

You’re a poor representative for the younger generation if you’re breaking rules and putting your customer (and yourself) in danger because of incompetence.
 
#26 ·
99cents, if anything I have said makes you think I am arguing with you I am sorry. I was merely asking a question, and was hoping for a straight forward answer. Not to be told I am incompetent, and should get out of the field just because I am asking a question. I am currently working for a large company doing mostly working on industrial electronics, while also doing side work with a licensed electrician. I have learned a lot through him, but I also like hearing others opinions on matters so I have multiple vantage points on how to view things. Sorry for asking a simple question.
 
#34 ·
Was asking if you could terminate a stranded wire really that bad of a question? I have never used one to terminate wires in anything but a control cabinet for industrial electronics, but was curious if it could be used in this application. The only way I have ever terminated a stranded wire at a receptacle or light switch before has been with a fork terminal. What is so bad about using a wire ferrule? No one has really stated why it isn’t acceptable, just said I was incompetent for asking if you could use them.
 
#36 ·
.

You were talking about “plug in holes” which can only mean one thing - push-in connections to the device. These are a source of failure over time and, besides that, you will never push a #12 ferrule into the hole. Then you talked about compression plate terminations which are fine with stranded wire.

If you want to do side work, hang ceiling fans for grandma and leave the real electrical work for those who know what they’re doing.
 
#40 ·
Luke, if the device you want to connect to has a screw that requires the wire to be wrapped around, then no, you can't wrap a ferrule around a screw. If the device has clamping plate that accept a solid wire in a straight orientation, then by all means use a ferrule to make a stranded wire into a solid wire. That's what they are for.
 
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#41 ·
Luke, if the device you want to connect to has a screw that requires the wire to be wrapped around, then no, you can't wrap a ferrule around a screw. If the device has clamping plate that accept a solid wire in a straight orientation, then by all means use a ferrule to make a stranded wire into a solid wire. That's what they are for.
If it has a clamping plate, why not just clamp onto the stranded wire?
 
#46 ·
Hack, a ferrule is just a mini term like a fork, a ring, or a butt connector that gets crimped on the end of a stranded wire to make it like a solid wire. I haven't really ever used them as I think forks are easier and even then I only use those in peckerheads for the ground. On a receptacle I don't think anyone would ever use one.
 

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