Extending a rising main?

[Darkwood]

well made crimp and good tape much better than scruffy chocblock stuck under the floor without tape

This is a poor crimp joint ... how is it a good one and i dont mean the tape or lack of heat shrink.

 

[Silly Sausage]

I think amlu means generally!

I can't see how that joint is holding together.
I'd be using these for those joints.

 

[i=p/u]

Rising main to me is cables going up (vertical) so strained maybe with weight , but I'd crimp other side

 

[Darkwood]

Actually may owe Amlu an apology .... looking closely there is a ratchet grip mark on the lower part of the crimp ... if this is a ratchet mark then the second crimp is on the other side out of view.....

Only the OP can confirm but if its been crimped once its a bad joint and may not survive a short circuit and if the other crimps are the same with one crimp they will be prone to overheating.

 

[youraveragejoe]

The cable is the main supply cable connecting the utility companies meter on the external wall to the domestic distribution board in the house.

I think what happened was that the cable was damaged at this point, the person cut out the damaged section, cut back the outer insulation, cut back a small section of the individual core insulation to allow for the crimp and then joined the cores, somewhat staggering the joints. They then wrapped each core in insulation tape and then wrapped the three cores together with more tape. No heat shrink, no conduit, no outer sleeve. The cable was running through the wooden structure of the house.

Thanks to everyone for the information, much appreciated.

 

[Darkwood]

Well if they are single insulated then deffo a no-no and require containing through-out or replacing with appropriate double insulated cable...

 

[Heisenberg]

Apart from excess insulation being removed and that it should have been crimped twice rather than the once

That was exactly what I was thinking. Looking at the joint as it stands, it's difficult to see how the single crimp could possibly hold both cables securely :sad3:. Why on earth would anyone go to the bother of doing crimps and then only crimp once :rolleyes2:

 

[Heisenberg]

Actually may owe Amlu an apology .... looking closely there is a ratchet grip mark on the lower part of the crimp ... if this is a ratchet mark then the second crimp is on the other side out of view.....

Tin Hat on, but I don't think there is any way that the bottom half of that barrel connector has been crimped. Well not with the same crimpers I use anyway.

 

[Darkwood]

My crimper only indents one side but keeps the other side complete but leaves a faint grip mark and thats what i saw in the photo ... it does seem obsurd that the repairer has the correct crimp and crimping tool but only crimps half the joint even common sense would have a novice putting a crimp onto each cable... so il edge my bets and say its just hidden on the other side.

 

[shanky887614]

My crimper only indents one side but keeps the other side complete but leaves a faint grip mark and thats what i saw in the photo ... it does seem obsurd that the repairer has the correct crimp and crimping tool but only crimps half the joint even common sense would have a novice putting a crimp onto each cable... so il edge my bets and say its just hidden on the other side.

if its worth doing its worth overdoing.

i double/tripple crimp everything

from 1mm ferules to 16mm+ crimps

for the time i takes why not double/tripple crimp

 

[Knobhead]

if its worth doing its worth overdoing.

i double/tripple crimp everything

from 1mm ferules to 16mm+ crimps

for the time i takes why not double/tripple crimp

With an indented crimp? If you did that on a job I was on you would be wiping your arse 2" below you're neck!



PS that crimp is over sized for fine stranded copper.

 

[shanky887614]

With an indented crimp? If you did that on a job I was on you would be wiping your arse 2" below you're neck!



PS that crimp is over sized for fine stranded copper.

mainly use belden/yy which is fine for 1mm ferrules

 

[Engineer54]

With an indented crimp? If you did that on a job I was on you would be wiping your arse 2" below you're neck!



PS that crimp is over sized for fine stranded copper.

How do you secure a butt crimp with a single crimp, be it an indent crimping tool or otherwise??
All our long shank cable lugs for both LV and MV terminations on cables 50mm and over all get double indent crimped!!

 

[Knobhead]

That isn't a long shank butt crimp and it isn't 50mm or anywhere like.

If it was something on a system critical cable I would always solder butt joints. I've never had a joint fail on either LV or MV.
Butt I'm old fashioned.

 

[Engineer54]

That isn't a long shank butt crimp and it isn't 50mm or anywhere like.

If it was something on a system critical cable I would always solder butt joints. I've never had a joint fail on either LV or MV.
Butt I'm old fashioned.

I was just making the point that Double indent crimping is standard practice on cable cable lugs. ie, It's not a detrimental practice. As for butt crimps, you crimp each cable into a butt crimp. Your probably right about the crimp termination shown is an over sized crimp... lol!!

I haven't used or seen a soldered joint or soldered lug now for more years than i care to remember. lol!!