It is very thick copper. Commonly installed during the 70s/early 80s according to the chap which is around when the house was built.
I wouldn't bank on that.
The 'figure of eight' dropwire that was installed on our previous house in 1973 was copper coated steel. We were in the house for thirty years and our drop wire, which must have been the shortest on the pole was still going when we sold in 2003, yet most of the other houses had had these replaced due to the wire work hardening and breaking.
That said, I have seen some black insulated 2-core PO cable which did look more like copper. Our drop wire was grey in colour.
Cheers!
Clive
"As I hurtled through space towards re-entry at twice the speed of sound the only thought in my mind was that this craft was entirely built by the lowest bidder!” Alan Shepard, Astronaut
Andrews & Arnold FTTC
DrayTek Vigor 2920Vn
"As I hurtled through space towards re-entry at twice the speed of sound the only thought in my mind was that this craft was entirely built by the lowest bidder!” Alan Shepard, Astronaut
Andrews & Arnold FTTC
DrayTek Vigor 2920Vn