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Discuss SWA Cable crimps in the Commercial Electrical Advice area at ElectriciansForums.net

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lincs1sparky

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Hi, I have some 185mm single cables terminated into an isolator. on inspection one of the cables is not fully inserted into the crimp. The is tight into the crimp but I can see thru the inspection hole it is not fully home. Is it ok to leave or should it be re-terminated? is there are chance of over-heating (hot spot) or if it is correctly crimped but not fully home it will be ok?
Many thanks for any help.
 

Sintra

Admin
Supporter
Take no chances with a beast of that size and re crimp properly.
 
A bit dodgy if you ask me. I personally would re-terminate. If you need to bend the cable or put some strain on it it may come out of the crimp. With a properly crimped cable you should not be able to look through the hole cos that is why it is there for.
look at a manufacturers data sheets i.e. Klauke .
hope this helps
 
K

Knobhead

  • Thread Starter Thread Starter
  • #4
Part of the reason the cores go beyond the crimp area is to give an anchor in the lug. If put under tension the cores could pull out.
 
E

Engineer54

  • Thread Starter Thread Starter
  • #5
Obviously not a well made off lug termination, but if there is no distortion to the crimping section of the lug, then there is enough cable within the crimped section to be called a solid joint, (if unsure ask for a second opinion). I take it these would be shaped cables and lugs to suit...

Obviously, it would be better to remake the crimped termination, but you then need to consider several other factors now that it's in service. Is there enough cable to remake?, do you have a hydraulic crimper suitable for 185mm? Can the supply be taken out of service/isolated etc, etc??... Remember, shortish lengths of 185mm cables can be a hellish job to bend out of an enclosure to work on, especially if crossed...even worse getting it back into position!! ...lol!!!
 
S

steveberry11

  • Thread Starter Thread Starter
  • #7
you say that you can see through the inspection hole. How short of being fully inserted are the conductors.
 
I would check there is enough slack on the core first to re-make as you won't stretch a 185, might be why its like it if it was cut too short to start with. Anyone working with cables of that size normally know about the hole so can't see it being accidental mistake.
unless the cables are dressed as ruff as a badgers .......
 
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lincs1sparky

  • Thread Starter Thread Starter
  • #9
Many thanks for the replies. I will see if there is enough slack to re-terminate and get a collegue to check also. I will be able to disconnect and get a better look in the end of the crimp.
 

benji

-
Arms
well the options are limited , is there enought length on core to fit new lug ( cut 2 vertical cuts up the sides of lug to remove ) crimp new lug using hex. dies ( using hex crimps can increase length of core slightly ) or re-gland cable
 
E

Engineer54

  • Thread Starter Thread Starter
  • #13
well the options are limited , is there enought length on core to fit new lug ( cut 2 vertical cuts up the sides of lug to remove ) crimp new lug using hex. dies ( using hex crimps can increase length of core slightly ) or re-gland cable
Now that's easier said than done when talking about a 185mm cable!! Besides i'm sure the OP stated that these terminated cables were singles.

I must admit i was thinking SWA cable when i first posted on the thread. Even so, it can still be a bit of a job, to pull up any slack even in trunking.

There are lugs available, with extended shanks suitable for such circumstances, just depends what sort of space he has available to work with. A photo or two would be nice, the members can then give a far more detailed view, on if a replacement lug is required or not and the best way to tackle it...
 
I think it depens on a number of factors whetehr the lug even needs tobe replaced. There are a nyumber of different manufactireres of lugs about, and they come in all shapes and sizes. Some have longer tubes that the conductor goes into than others. IMO, provided there is enough uncrimped copper beyod the crimp insuide the lug, then i would leave it. I would have to have a look at it to give an informed opinion. when using a small hex crimper, then i double crimp, but if its a large crimp die, then one will suffice in 90% of applications.
Indent crimpers cannot usually be used to double crimp.

If it is possible to isolate the circuit, then i would unbolt the lug, and insert an appriopriately sized round object throught the hole, and attempt to pull the lug off. It shouldnt move. I would also attempt to gently twist the lug off using an adjustable spanner. Again, it shouldnt move.
 

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