Questionable Conductor Size

[westward10]

They have worked miracles to slim down a 70mm so it fits a 50mm lug.

 

[Spenny]

I will ductor the length tomorrow and calculate the resistance value expected. This just does not add up to me.

 

[static zap]

I will ductor the length tomorrow and calculate the resistance value expected. This just does not add up to me.

I like it ,if they have squashed the air out,without making it brittle locally.

 

[James]

I like it ,if they have squashed the air out,without making it brittle locally.

So similar to using shaped conductors rather than round to get a smaller overall diameter on the multi core cable, they have taken a stranded single core and run it through a series of rolls so the strands become shaped.

 

[Bobster]

So similar to using shaped conductors rather than round to get a smaller overall diameter on the multi core cable, they have taken a stranded single core and run it through a series of rolls so the strands become shaped.

Yes but shaped conductors still have a CSA of 70mm, shaping them only improves the overall diameter of the cable.

This clearly is not a 70mm cable.

 

[westward10]

This is a 50 next to a 70 so it would require some magic to reduce one to the other without affecting its csa.

 

[snowhead]

They have worked miracles to slim down a 70mm so it fits a 50mm lug.

And then go to the trouble of padding out the whole cable to the same overall diameter as a 70mm.

 

[Lucien Nunes]

As you'll soon be in a position to test the resistance there's little point doing what I was going to suggest which was to cut the ends of an offcut carefully square, measure the length, strip the insulation, weigh the copper and determine the CSA from the density.

A 70mm² solid conductor is only 9.44mm diameter and the ideal compacted conductor is as close to this as possible. Datasheets for a couple of 50mm² terminals give the cable socket ID as 9.6 and 10mm respectively, so it is theoretically possible for a compacted 70mm² to fit a 50mm² lug, although I too am surprised it fits that easily.

 

[davesparks]

I've noticed a trend for compacted conductors getting to be an increasingly sloppy fit in lugs, it doesn't inspire confidence.
I always ask for correct lugs to be supplied with a cable wherever possible, yet still they turn up loose.

 

[Strima]

We were supplied with some 10mm hybrid cable (fibre in the same sheath) and very few 10mm crimps fit correctly, turned out it was 8 AWG cable from China.