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Wire keeps coming out of crimp connectors.

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Ed_McCarron:


--- Quote from: somunny on February 24, 2008, 04:28:47 pm ---
--- Quote from: MaximRecoil on February 23, 2008, 06:44:31 pm ---

--- End quote ---

It probably won't make a difference, but it looks like he crimped the lugs with the wrong crimper.  Correct me if I'm wrong but I don't think you're supposed to use a cleat on an insulated connector.  It can damage the insulation.

--- End quote ---

Correct.  The crimp tool I use in the field has two nests; one for insulated, and one for non-insulated.  The insulated nest forms the crimp without breaking the insulation sleeve.

That said, we (electricians) all use the pinching nest - even on insulated connectors because it seems to work better if the insulation isn't critical.

The one I use in the shop has a ratchet setup and makes a formed crimp - looks much neater, but was bloody expensive.

Either way, a properly done crimp is gastight - oxidation internally won't be a problem.  The key is properly done.  Correct lug size, correct # of conductors, correct prep.  Theres still a good bit of wiggle room.

MaximRecoil:


--- Quote from: Ed_McCarron on February 28, 2008, 10:07:27 am ---Correct.  The crimp tool I use in the field has two nests; one for insulated, and one for non-insulated.  The insulated nest forms the crimp without breaking the insulation sleeve.

That said, we (electricians) all use the pinching nest - even on insulated connectors because it seems to work better if the insulation isn't critical.
--- End quote ---

That's the type of crimp I use for insulated connectors as well, and I've done so ever since I noticed the installers at a car audio place using that type of crimp. It creates a much tighter crimp than the typical football-shaped crimps on the ends of cheap crimpers.  


--- Quote ---The one I use in the shop has a ratchet setup and makes a formed crimp - looks much neater, but was bloody expensive.
--- End quote ---

I wonder if that's like the crimps that Level42 (I think?) makes. I've seen pictures but I don't know where to find them right now; but they look very professional.

Ed_McCarron:


--- Quote from: MaximRecoil on February 28, 2008, 10:39:39 am ---I wonder if that's like the crimps that Level42 (I think?) makes. I seen pictures but I don't know where to find them right now; but they look very professional.

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Heres the one I have...

http://www.electriciansupplies.com/index.cfm/S/312/N/11537/P/83105/Thomas_&_Betts_WT145A_--_1_each.htm

fixedpigs:


--- Quote from: MaximRecoil on February 26, 2008, 11:47:12 am ---Oxidation occurs on the surface, which can degrade a surface-to-surface contact connection.

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you know that electricity only travels on the surface of the wire right...and not through it...?

Ed_McCarron:


--- Quote from: fixedpigs on February 28, 2008, 10:50:16 am ---
--- Quote from: MaximRecoil on February 26, 2008, 11:47:12 am ---Oxidation occurs on the surface, which can degrade a surface-to-surface contact connection.

--- End quote ---

you know that electricity only travels on the surface of the wire right...and not through it...?

--- End quote ---

Skin effect only applies to higher frequencies.  At DC, we use the whole wire, IIRC.

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