Crimps inside the CU

[cogsey133]

I have seen a lot of crimps fail due to improper use of tools and the incorrect amount of conductor showing. When working on london underground trains we had so many fail that we had to strip an exact amount on the cable and use calibrated crimping tools!

 

[Darkwood]

Overcrimping is caused when you have an adjustable set and deliberately set crimp to a lower lug size assumably the thought on this is to get a tighter crimp, it valleys a circular crimp into a u-shape and can weaken the structure of the crimp itself, yes im a bit of a perfectionist i suppose but im not to NASA's standards as solid cores and tinned strandeds are a big NO! NO! ....

Have a browse at this regulation crimping guide for NASA .... check all the none complying crimpings further down the page and you thought i was picky
CRIMPED TERMINATIONS GENERAL REQUIREMENTS
.

 

[Geordie Spark]

I have seen a lot of crimps fail due to improper use of tools and the incorrect amount of conductor showing. When working on london underground trains we had so many fail that we had to strip an exact amount on the cable and use calibrated crimping tools!

Aye ... well that's why aahh aalways SOLDER mine lyke ... ye cannit beat a propa soldered joint.

 

[cogsey133]

aye but some pikey nicked the lead out of my solder!

 

[Darkwood]

Aye ... well that's why aahh aalways SOLDER mine lyke ... ye cannit beat a propa soldered joint.

In comparison and may be counter-intuative but crimps are better than a solder joint so il stick to mi crimping

 

[Engineer54]

I have seen a lot of crimps fail due to improper use of tools and the incorrect amount of conductor showing. When working on london underground trains we had so many fail that we had to strip an exact amount on the cable and use calibrated crimping tools!

These are the major causes of failures. All too often even a good crimping tool in the hands of a novice adds up to a good many crimp failures... lol!!!

 

[Geordie Spark]

aye but some pikey nicked the lead out of my solder!

That'll be Wor Lass ........ aahll sort her oot for ye :30:

 

[DurhamSparky]

i hate crimps unless used at the end of a cable to attach a lug onto...!! (stranded cable) cable joins can be achieved in better ways!

 

[cogsey133]

[FONT=Calibri, sans-serif]i think the calibration comes under [/FONT]BS EN60352-2:2006 Section 5

 

[Geordie Spark]

In comparison and may be counter-intuative but crimps are better than a solder joint so il stick to mi crimping

What make ye think that lyke??? mg_smile:

 

[Marvo]

I'm surprised nobody's mentioned 'twist-it's' yet.

 

[cogsey133]

I'm surprised nobody's mentioned 'twist-it's' yet.

ah the good old days!

 

[sedgy34]

connectors are the best with a plaster round it

 

[Engineer54]

Overcrimping is caused when you have an adjustable set and deliberately set crimp to a lower lug size assumably the thought on this is to get a tighter crimp, it valleys a circular crimp into a u-shape and can weaken the structure of the crimp itself, yes im a bit of a perfectionist i suppose but im not to NASA's standards as solid cores and tinned strandeds are a big NO! NO! ....

Have a browse at this regulation crimping guide for NASA .... check all the none complying crimpings further down the page and you thought i was picky
CRIMPED TERMINATIONS GENERAL REQUIREMENTS

.

Darkwood, your now talking about very specialised installations now, that are far, far outside any of our requirements!! lol!!!

Exactly as i stated above, but that is always down to the failure of the operator not the crimp lug or the crimping tool....

 

[i=p/u]

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