SWA long run

[Rockingit]

To be honest on this occasion I think the DNO may even be the cheaper option by the time the trench is dug and the cable pulled in.
There is the added advantage of if things go belly up it’s their problem.

Completely agree - have seen DNO's turn up with three wagons, six blokes, lay many metres of cable and charge less for the whole job than I could have bought the cable for!

If you dig / arrange the trench I'm sure they'll happily oblige, you get much better loop figures and know the job's a good'un.

 

[Knobhead]

and know the job's a good'un.

Oh come on, that’s a bit of a rash statement. But as I said if it does ***k up it’s their problem.

:rofl:

 

[drew35]

I agree, DNO. Can they use a mole over that distance to save digging? I've seen them do it enough times over a short distance.

 

[Rockingit]

Oh come on, that’s a bit of a rash statement. But as I said if it does ***k up it’s their problem.

:rofl:

Rash??! Back to the docs for me again, then.

 

[monkeyhanger]

I phoned the DNO (NEDL) who wouldn't comment at all. I got passed on to someone who told me the website address to get a form to apply to move the meter.

 

[Engineer54]

This site's distribution system sounds like a complete Pig's Ear. It just has to be a DIY set-up. I can't see any Electrical Contractor installing such a system, Nor any qualified electrician come to that. I suppose i can't talk for some of these 17th only DI's, but even they should know better!! If our OP sticks to his guns and refuses issuing any cert's based on this potentially dangerous distribution sub-main, then something will get done about it. It's going to get a might expensive for someone down the line on this one!! lol!!

 

[Welchyboy]

so just doin a quick few calcs....35mm swa over 180m at 60A ib = 13.5V VD at end of cable
50mm = 10v VD
70mm = 6.8v VD
95mm = 4.9v VD

And thats just to the bungalow without the final circuits or the stables supplies, so the lighting circuits are never goin to comply with allowed voltage drop??

how would you overcome this situation??

surely only the distributor could resolve this issue?

 

[Engineer54]

so just doin a quick few calcs....35mm swa over 180m at 60A ib = 13.5V VD at end of cable
50mm = 10v VD
70mm = 6.8v VD
95mm = 4.9v VD

And thats just to the bungalow without the final circuits or the stables supplies, so the lighting circuits are never goin to comply with allowed voltage drop??

how would you overcome this situation??

surely only the distributor could resolve this issue?

Separately fused sub-main distribution circuits!!!

It doesn't comply in several areas, not just on the volt drop. As you say, this mixed size run of parallel cables is feeding at least 2 other installations on this site, so they won't comply either!!

 

[lamb]

Either way, the customer would have to run a larger cable. Either pay the DNO or an electrical contractor to do the work.
Alternatively the DNO could alter the medium voltage network and provide a pole mounted sub adjacent to the property, though for a run of only 180m this would probably not be cost effective.
I have done one of these jobs before, with a large property, driveway was a few hundred meters long. DNO installed supply to a kiosk on property boundary, and we ran 185mm SWA in a trench along the driveway. Either end was terminated in a poured resin joint underground and spliced onto 25mm SWA for ease of termination in house/kiosk.

 

[Welchyboy]

Either way, the customer would have to run a larger cable. Either pay the DNO or an electrical contractor to do the work.
Alternatively the DNO could alter the medium voltage network and provide a pole mounted sub adjacent to the property, though for a run of only 180m this would probably not be cost effective.
I have done one of these jobs before, with a large property, driveway was a few hundred meters long. DNO installed supply to a kiosk on property boundary, and we ran 185mm SWA in a trench along the driveway. Either end was terminated in a poured resin joint underground and spliced onto 25mm SWA for ease of termination in house/kiosk.

185mmm SWA in trench 200m ££££££££££££££££££££££££££££££££££!