Appendix 4, section 6.1 equation 6

Sparkingchip: 
 

Zoomup: 
 

Sparkingchip: 
 

Cable and drum around 100 kg.

That's only the weight of a big bloke.

 

Z.

And if that bloke went down on the floor it would  probably take an ambulance crew of two with an inflatable cushion to get him back up again, I would not be able to lift him as a deadweight. 

Cable drum handling

Cable-Guide.pdf (iugaza.edu.ps)

Z.

Portable lifting crane.

Z.

My local independent electrical wholesaler has various bits of kit they “hire out”  including big crimpers and cable drum handling equipment.

If I were looking at doing this job I would be having a look in their warehouse to see what is available if needed.

As one of my customers put it, “What you really need is one of those twenty year old Polish lads like the ground workers and solar guy have”.

You could always order three 100 metre rolls and some trailing plugs and sockets to reduce the weight of the cable being handled at any one time, but that alters the cable selection criteria.

So, where exactly is this cable going to be used? In a very hot railway tunnel? We need more info. I feel.

Z.

The question was more about understanding application of the equation,  I was surprised that the ambient temperature had so little effect on the cable, when I was expecting a resistance increase due to the temperature.

I believe this has be explained by the under utilisation of the cables capacity.

The cable itself is not something that would appear it the tables. Its a custom manufactured for the application.  

I just picked a cable from the tables to work though the sum with some familiar numbers. I think now in hindsight that one of the 4FX tables  would have been a better analogy as its a flexible installation rather than a permanent install, not that would have affected the understanding of the sum.