Advice on long SWA cable run and new supply

[jim payne]

Hi,
I have a house with a standard mains supply coming down a pole in the front garden to a brick meter housing.
I also have a bungalow that is 350 metres away and is also supplied from my existing mains supply via an underground SWA cable (7 strand 1.1-1.4mm so 10A I think max) 50 metres past that is another building which is to be replaced by a new house.
I have ordered 2 new 5KVA supplies which will also come down the pole and terminate in 2 new utility cabinets which will house the meters on either side of the existing brick built one.
I then intend to run 2 x 16mm 2 core SWA cables underground to replace the old SWA cable to the bungalow and supply a new supply to the new house. The new house will have 5kw solar panels and possibly a Tesla powerwall and be very low energy requirements.
Couple of questions...
1) I intend to put earth spikes on each end of each cable connected to the armouring, is this ok?
2) Is there any reason I can't run the two cables in one 63mm dia twin duct? (I mean is there an issue with capacitance or something)
3) The cable run is across my own land, garden, field, driveway I assume I just use common sense approach as to cable depth and include tape above it?
4) Best place to buy the SWA cable from?
Regards
Jim

 

[DPG]

I don't know the best answer to this, but 2 questions come to mind:
Why the spike at each end of the SWAs?
What earthing system do you have?

 

[Spoon]

What has the electrician, who will be testing the new circuits, said?

 

[buzzlightyear]

I'm holding my breath on this one !

 

[buzzlightyear]

go on give us a clue is a TT system with totem poles in garden!

 

[Octopus]

Pop corn at the ready...

 

[buzzlightyear]

get the barbecue out it is going to be a long night .

 

[buzzlightyear]

What has the electrician, who will be testing the new circuits, said?

there isn't one !

 

[Spoon]

there isn't one !

We will see what the OP says..... If he gets back to us....

 

[buzzlightyear]

may be he has one of these .

 

[Octopus]

Back to the op on a more serious note, I very much doubt the supplier will connect anything without a test cert from a sparky.....

 

[jim payne]

I don't know the best answer to this, but 2 questions come to mind:
Why the spike at each end of the SWAs?
What earthing system do you have?

Hi,
The existing SWA is earthed at the far end only, it was installed in 1970's
So, it seems logical to me to earth each end?
At this stage I am only concerned with running the cables in correctly, neither supply will be connected for some time (house not got planning yet)
Regards
Jim

 

[jim payne]

What has the electrician, who will be testing the new circuits, said?

Hi,
House hasn't got planning yet so I'm along way off appointing an electrician. All I need to do at this stage is run the cables in, the supplies, won't be used for some time to come.

 

[jim payne]

Back to the op on a more serious note, I very much doubt the supplier will connect anything without a test cert from a sparky.....

Hi, the supplier is only putting the mains supply in, they are not connecting to anything. Once they are in I choose a meter provider who installs just the meters.
Regards
Jim

 

[jim payne]

Back to the op on a more serious note, I very much doubt the supplier will connect anything without a test cert from a sparky.....

Hi,
They aren't connecting to anything, just putting the supply in.

 

[Spoon]

Hi,
House hasn't got planning yet so I'm along way off appointing an electrician. All I need to do at this stage is run the cables in, the supplies, won't be used for some time to come.

Yet you are asking questions regarding the installation of power cables to regulations....
Can't have one without the other..

 

[DPG]

Yet you are asking questions regarding the installation of power cables to regulations....
Can't have one without the other..

As above ^^^. I would have thought all you can do at this stage is get some trenches ready.

 

[Octopus]

^^ where do you think the meters will be?

 

[Octopus]

^^ where do you think the meters will be?

 

[Pete999]

Pop corn at the ready...

Or Freddos