A science question?

[CALLAKN]

All sounds a bit dangerous !!

im an overhead linesman, once a sparky... all old LV service cables running in villages and to houses, were once open wire... then concentric cable came in, which was from the LV pole (open uninsulated wire) to the house... and now, we replace all old open wire, with ABC (Ariel bunched cable, this is insulated)

 

[CALLAKN]

ok, so im no scientist, but i know copper and aluminium dont mix.

When we join a copper cable with an aluminium cable we have to use a bi-metal joint, OR if we dont have one, we cover the copper in a brass gause type material before putting it into a aluminium connector,

copper erodes aluminium, over time the open wires go from a nice shiny copper look to the green/weathered look... i can only assume as stated above, that the water dripping off the copper cables is carrying a v dilute solution of whats copper is made up of, and therefore eroding the aluminium chassis.

When we press joints on over head lines and have to connect aluminium to copper, the aluminium has to sit above the copper, for this very reason... otherwise the copper will erode the aluminium joint due to rain (weathering)

 

[DaveD]

ok, so im no scientist, but i know copper and aluminium dont mix.

When we join a copper cable with an aluminium cable we have to use a bi-metal joint, OR if we dont have one, we cover the copper in a brass gause type material before putting it into a aluminium connector,

copper erodes aluminium, over time the open wires go from a nice shiny copper look to the green/weathered look... i can only assume as stated above, that the water dripping off the copper cables is carrying a v dilute solution of whats copper is made up of, and therefore eroding the aluminium chassis.

When we press joints on over head lines and have to connect aluminium to copper, the aluminium has to sit above the copper, for this very reason... otherwise the copper will erode the aluminium joint due to rain (weathering)

To me that sounds like the answer to the original question.

 

[Pummer67]

Totally agree with CALLAKN. I originally trained as a linesman and now cable jointer aswell. Copper and Ali cause a bi metal reaction and in our area there is still a reasonable amount of bare conductor going to houses or buildings.

 

[CALLAKN]

Totally agree with CALLAKN. I originally trained as a linesman and now cable jointer aswell. Copper and Ali cause a bi metal reaction and in our area there is still a reasonable amount of bare conductor going to houses or buildings.

which DNO do you work for?

 

[Tourershine]

ok, so im no scientist, but i know copper and aluminium dont mix.

When we join a copper cable with an aluminium cable we have to use a bi-metal joint, OR if we dont have one, we cover the copper in a brass gause type material before putting it into a aluminium connector,

copper erodes aluminium, over time the open wires go from a nice shiny copper look to the green/weathered look... i can only assume as stated above, that the water dripping off the copper cables is carrying a v dilute solution of whats copper is made up of, and therefore eroding the aluminium chassis.

When we press joints on over head lines and have connect aluminium to copper, the aluminium has to sit above the copper, for this very reason... otherwise the copper will erode the aluminium joint due to rain (weathering)

Not just a handsome face, thanks mate.
For once, you've helped me out instead of the other way round.

 

[Pummer67]

SSE.

You?

 

[CALLAKN]

SSE.

You?

lucky you! proper outfit!

unlike me at northernpowergrid

 

[CALLAKN]

Not just a handsome face, thanks mate.
For once, you've helped me out instead of the other way round.

no worries dad, always here to keep your brain ticking over.

 

[DXX]

All sounds a bit dangerous !!

90% of what kids did in the ‘60’s was dangerous, we used to climb the trees with the cables running through them.

 

[VanDamMan]

It all started off with a simple question....What we all learn today is that what was done years ago was driven by costs and profits....
If you bury a cable it should last longer...but not always practical...then next best option...but how long will it last...
We live in a world of change ..with that comes employment...change this..update that...that builds the economy

But a simple answer...don’t park under cables. ( you’ll still get dirty caravans where ever you park them )