And the numpty award goes to

nickblake · Apr 20, 2015

3 core swa,
armour used as a neutral ,

Carlosfandango · Apr 21, 2015

If it was concentric would the neutral not be copper? That looks like steel?

Bobster · Apr 21, 2015

Carlosfandango said:
If it was concentric would the neutral not be copper? That looks like steel?

Not with an Au cable

Andy78 · Apr 21, 2015

Rob said:
Not with an Au cable

That's got to be one expensive cable !!! Would be nice and pliable though

Carlosfandango · Apr 21, 2015

What about dno cable, it's an aluminium core with copper outer cores. Is it not? Now I'm doubting myself!

mechelec · Apr 21, 2015

Looks a lot like 35 mm Alpex ally waveform

Knobhead · Apr 21, 2015

gnselectricals said:
If it's armouring it doesn't look like there's much of it there for that size of line conductor

It only needs to be ½ the size of the line conductors due to this:
I[SUB]n[/SUB] = √((I[SUB]a[/SUB]²+I[SUB]b[/SUB]²+I[SUB]c[/SUB]²)-((I[SUB]a[/SUB]*I[SUB]b[/SUB])+(I[SUB]a[/SUB]*I[SUB]c[/SUB])+(I[SUB]b[/SUB]*I[SUB]c[/SUB])))

cprfenom · Apr 21, 2015

Tony just became sexy

Knobhead · Apr 21, 2015

Carlosfandango said:
What about dno cable, it's an aluminium core with copper outer cores. Is it not? Now I'm doubting myself!

The DNO’s phased out the wavecon Al concentric due to sheath damage causing the neutral to rot away.

It caused a hell of a problem in Nottingham when the water board damaged a feeder to a housing estate. I was at the EMEB training college when it happened, they brought the offending piece of cable in for their “black museum”.

Knobhead · Apr 21, 2015

cprfenom said:
Tony just became sexy

You need your bloody eyes testing!

mechelec · Apr 21, 2015

Tony said:
The DNO’s phased out the wavecon Al concentric due to sheath damage causing the neutral to rot away.

It caused a hell of a problem in Nottingham when the water board damaged a feeder to a housing estate. I was at the EMEB training college when it happened, they brought the offending piece of cable in for their “black museum”.

Still get neutral faults on alpex from sheath damage. Looks like a bulging growth when you find it. All that butyl rubber bedding doesn't stop it either like it was supposed to. Can be a bugger to strip as well.

Knobhead · Apr 22, 2015

Phased out as in stopped installing it. There’s miles of it still in service and will be for a long time. Like every utility, the infrastructure is clapped out but so long as it keeps going they’ll patch it up.