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Wire keeps coming out of crimp connectors.
MaximRecoil:
--- Quote from: Jdurg on February 26, 2008, 11:27:11 am ---I've actually learned that folding a wire is just as bad for the signal as cutting and splicing is. By folding it, you are altering the crystal structure and this can cause just as many problems as a proper cut and twist/crimp.
--- End quote ---
That's ridiculous. Additionally, it is more of a bend than a fold anyway. But in any event, I'd like to see your data on folding wire altering the crystal structure and having an adverse effect on electrical conductivity.
--- Quote ---In addition, cutting the wire does NOT in anyway alter the oxidation ability. Oxidation is a chemical process. Chemical processes do not give a damn about how the wire is set. If there is an exposed surface, it will be oxidized if the right chemicals are in the atmosphere. Whether the wire is cut or folded, it has the same propensity to oxidize no matter what you think. Chemistry doesn't give a crap about what or who you are. ;D
--- End quote ---
I need to repeat myself here for the sake of folks who don't read so well:
--- Quote from: MaximRecoil on February 26, 2008, 01:22:53 am ---You either didn't read or didn't understand what I said. Generally the two wires are twisted together and then crimped. Oxidation of copper can affect the connection in a twisted wire splice. Ideally, the crimp connector will be the "tie that binds" so to speak, and prevent any problems, but that is assuming a perfect crimp; something for which the margin of error decreases as you add more wires to the single crimp connector.
--- End quote ---
In other words, it is obviously not the cut, in and of itself, that causes potential oxidation problems, it is the fact that once you cut the wire and twist it back together, you are now relying on surface-to-surface contact (by twisting) to close the circuit. Oxidation occurs on the surface, which can degrade a surface-to-surface contact connection.
pcb:
There is no advantage to either way if you properly crimp the wire to the terminal. I've used both ways. And for me, it just makes more sense to cut the wires, strip and twist them together before crimping them.
Insulated terminals are by far the easiest crimp you'll ever make. Even the cheap-o tools work well on these types of terminals if you have the correct size terminal for the wire you are crimping.
You should end up with 2 crimps. The crimp farthest from the wire insertion hole should catch the stripped bare wire, the other crimp should catch the insulation. If you do this, your crimp is going to be nice and strong.
When crimping multiple wires, if the combined insulation will not fit into the metal housing, you are using too small of terminal, go the next size up.
- Mike -
2600:
I've been meaning to post something like this in the review section, but haven't gotten around to it.
I have always despised crimping terminal connectors. I'd buy cable before using the "manual" tool. The plastic end would always look beat to hell when I was done with it. I must of used around 5 different versions of them and I'd get the same result if it was made by AMP or Radio Shack.
Last year I bought a ratcheting crimper and it has to be one of my best tool purchases. It makes both crimps at the same time and they are perfectly crimped each time. I believe I have the Tool Aid 18900 and it cost like $25 and it's regularly on EBay. It doesn't cost that much more then the AMP and other manual tools and am unsure why the ratcheting tool hasn't abolished the "manual" tools.
The other tool I picked up near the same time was a wire stripper similar to the Tool Aid 18950. Best wire stripper I've ever used. No more spot guessing lengths or cutting strands of the wire.
TheShanMan:
Thanks 2600. I'm always looking for better tools! I'll check it out!
Jdurg:
--- Quote from: MaximRecoil on February 26, 2008, 11:47:12 am ---
--- Quote ---In addition, cutting the wire does NOT in anyway alter the oxidation ability. Oxidation is a chemical process. Chemical processes do not give a damn about how the wire is set. If there is an exposed surface, it will be oxidized if the right chemicals are in the atmosphere. Whether the wire is cut or folded, it has the same propensity to oxidize no matter what you think. Chemistry doesn't give a crap about what or who you are. ;D
--- End quote ---
I need to repeat myself here for the sake of folks who don't read so well:
--- Quote from: MaximRecoil on February 26, 2008, 01:22:53 am ---You either didn't read or didn't understand what I said. Generally the two wires are twisted together and then crimped. Oxidation of copper can affect the connection in a twisted wire splice. Ideally, the crimp connector will be the "tie that binds" so to speak, and prevent any problems, but that is assuming a perfect crimp; something for which the margin of error decreases as you add more wires to the single crimp connector.
--- End quote ---
In other words, it is obviously not the cut, in and of itself, that causes potential oxidation problems, it is the fact that once you cut the wire and twist it back together, you are now relying on surface-to-surface contact (by twisting) to close the circuit. Oxidation occurs on the surface, which can degrade a surface-to-surface contact connection.
--- End quote ---
Please tell me how properly twisting and crimping a connection removes that surface-to-surface connection? You do realize that for oxidation of the metal surface to occur the metal has to be exposed to an oxidizing material. A properly twisted and crimped connection will have no oxidizers around to oxidize the copper. The only way the copper will oxidize is if the person making the crimp did a very poor job of crimping the connection, and in that case it wouldn't matter if he twisted it together OR used your fold technique.
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