I needs crimps

[mike os]

Yes but have you checked it with a milli-ohm meter?

Need to crimp the leads first

 

[Hood]

I too have used the cheap ratchet type crimpers for years and never had an issue, only thing I have had to do is adjust the wee notched plate to max and they have worked well enough. What I find more problematic is some of the insulated crimp terminals themselves, some are really nasty and you have to crimp twice in slightly different places to get it to grip properly.

 

[mike os]

I too have used the cheap ratchet type crimpers for years and never had an issue, only thing I have had to do is adjust the wee notched plate to max and they have worked well enough. What I find more problematic is some of the insulated crimp terminals themselves, some are really nasty and you have to crimp twice in slightly different places to get it to grip properly.

If you have to do that it's the wrong crimp/plier combination or wrong size for the cable...

 

[Hood]

If you have to do that it's the wrong crimp/plier combination or wrong size for the cable...

Nope, crap terminals. Just finished wiring up a boat and had a mixed batch of crimps that were supplied to me, some of them (same colour) needed two crimps to get them to grip securely, the others were fine.

 

[mike os]

Supplied crimps go,in the bin

 

[pawsnizzy]

I have soldered many hundreds, if not thousands, of wires in cars and engine bays, even on engine looms.

Not had one failure due to vibration

Still bad practice mate - but, apart from being a sparky, my background is aerospace/military

 

[mtt.tr]

I too have used the cheap ratchet type crimpers for years and never had an issue, only thing I have had to do is adjust the wee notched plate to max and they have worked well enough. What I find more problematic is some of the insulated crimp terminals themselves, some are really nasty and you have to crimp twice in slightly different places to get it to grip properly.

That's really what I was asking but it went very much down a beaten track around the houses,past a bush and some

 

[Kayos]

Still bad practice mate - but, apart from being a sparky, my background is aerospace/military

Why is it bad practice, if in practice it works perfectly fine without issue?

Ive seen more failed crimp connections than soldered ones

Also NASA recommend soldering in their version of the Western Union Splice, I think they know a thing or about critical joints

 

[mtt.tr]

Why is it bad practice, if in practice it works perfectly fine without issue?

Ive seen more failed crimp connections than soldered ones

Also NASA recommend soldering in their version of the Western Union Splice, I think they know a thing or about critical joints

Bad practice is subjective,I'm pretty sure plumbing your house using garden hose pipe is bad practice. But it works so??

 

[Kayos]

Bad practice is subjective,I'm pretty sure plumbing your house using garden hose pipe is bad practice. But it works so??

I dont think it is, if its bad practice there must be a reason
Has there been a study of vibration related failures of soldered joints Vs crimped joints?

Hosepipe I generally rated to 50 deg c maximum so would be fine for cold water but not dhw or central heating

 

[Hood]

I have seen soldered battery terminals fail on fishing boats before, corrosion may also have been a factor however.

 

[mike os]

Time and place for solder and crimps... not really answering the op though is it ?

 

[mtt.tr]

Time and place for solder and crimps... not really answering the op though is it ?

I've given up, decided to order some from various suppliers and see what's best.

 

[pawsnizzy]

Why is it bad practice, if in practice it works perfectly fine without issue?

Ive seen more failed crimp connections than soldered ones

Also NASA recommend soldering in their version of the Western Union Splice, I think they know a thing or about critical joints

Splicing is very different. NASA think they know more about O rings than the manufacturer, hence Challenger

 

[PhillipM]

Has there been a study of vibration related failures of soldered joints Vs crimped joints?

Shedloads, that's why car looms are crimped everywhere possible. Hell some of the ECU systems are now using push pin chips instead of solder joints too.

 

[Kayos]

Shedloads, that's why car looms are crimped everywhere possible. Hell some of the ECU systems are now using push pin chips instead of solder joints too.

Care to supply a link, genuinely interested in reading

I once repaired a dash loom someone had chopped every plug off, with solder and heatshrink. I know the car is still working perfectly 15 years later

 

[PhillipM]

Not that I have to hand, but I remember reading through dozens of them on .ac sites back when I first started building vehicle wiring looms, there's literally hundreds of papers on it.

 

[Arc Tourist]

Splicing is very different. NASA think they know more about O rings than the manufacturer, hence Challenger

I remember watching the launch on an inside channel when we were building the new AFRTS broadcast center in Sun Valley, a sad day.

 

[brightspark]

Nope, crap terminals. Just finished wiring up a boat and had a mixed batch of crimps that were supplied to me, some of them (same colour) needed two crimps to get them to grip securely, the others were fine.

sounds a bit like using screwfix blue and red crimps or unheard of makes there soft copper and cables just pull out . i only use branded quality crimps and give em a good tug just to make sure there properly crimped

 

[MetalMonkey]

Why is it bad practice, if in practice it works perfectly fine without issue?

Ive seen more failed crimp connections than soldered ones

Also NASA recommend soldering in their version of the Western Union Splice, I think they know a thing or about critical joints

NASA also recommend using crimping over solder for termination:

"Crimping is an efficient and highly reliable method to assemble and terminate conductors, and typically provides a stronger, more reliable termination method than that achieved by soldering."
https://workmanship.nasa.gov/lib/insp/2 books/links/sections/201 General Requirements.html

There workmanship standards are freely available and an interesting read if you are genuinely interested.

If the crimp connector failed, it wasn't crimped properly - hence the need to use good quality crimps and crimpers.
As per my previous reply, soldering is acceptable in certain applications, but it depends how the cable is supported.

The aviation & aerospace industry is very prescriptive over working procedures, and you follow them exactly.
It will be stated how a connector is terminated and what components are used, and that is what you use.
Difficult to call the AA out to a 747 at 35,000 feet.

Hosepipe I generally rated to 50 deg c maximum so would be fine for cold water but not dhw or central heating

I'd be concerned to find a house plumbed with garden hose. I'd also be concerned about any plumber that recommended doing so.
Convention exists in every industry and usually for good reason.