Author Topic: Wire nuts vs. screw terminals  (Read 739 times)

Offline phillamb168

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Wire nuts vs. screw terminals
« on: October 04, 2013, 06:07:58 AM »
So I was talking about DIY the other day with a (somewhat of a) know-it-all colleague. He proceeded to tell me that wire nuts were incredibly dangerous because of 'microvibrations' that can cause fires.

The only available option here are these screw terminals:


They're used for everything. In my mind they're super bulky and much less safe because they're so hard to screw down properly (jewler's flathead, for the most part).

I am pretty sure that it's just standard 'my dad told me it was bad 50 years ago, so it must still be the case,' but I'd like some ammo for the discussion.
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Offline crandom

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Re: Wire nuts vs. screw terminals
« Reply #1 on: October 04, 2013, 06:12:45 AM »
I'm an Electrician. I would say wire nuts work just fine when using solid wire. If you are using stranded wire wire nuts will also work but soldering or those terminals would be better especially if there is vibrations in your project.

Offline punatic

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Re: Wire nuts vs. screw terminals
« Reply #2 on: October 04, 2013, 06:51:41 AM »
I've found wearing a tinfoil hat shields you from microvibrations. 

Proof?  My head has never caught on fire!
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Offline Joe Sr.

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Re: Wire nuts vs. screw terminals
« Reply #3 on: October 04, 2013, 09:07:34 AM »
I'm no electrician, but I've used wire nuts for many years.  I tend to slob them up with electricians tape, too, though.
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Offline redbeerman

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Re: Wire nuts vs. screw terminals
« Reply #4 on: October 04, 2013, 10:30:11 AM »
I'm an Electrician. I would say wire nuts work just fine when using solid wire. If you are using stranded wire wire nuts will also work but soldering or those terminals would be better especially if there is vibrations in your project.

This ^^^^^^  You can mix solid with stranded with wire nuts in a static installation, but if there is any movement, soldering is your best bet.
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Offline MDixon

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Offline phillamb168

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Re: Wire nuts vs. screw terminals
« Reply #6 on: October 04, 2013, 01:55:49 PM »
I should specify, this is for an overhead pendant lamp's junction box. There will be no real vibration as the ceiling beams are 16 inches thick.
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Offline gymrat

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Re: Wire nuts vs. screw terminals
« Reply #7 on: October 04, 2013, 02:05:10 PM »
I am also an electrician. I see no problem with wire nuts. Particularly in the situation you are describing. I think wrapping up in electrical tape is a really good precaution.
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