I am trying to identify the cable that feeds our house consumer unit. It was buried many years ago, before 1998 at least and quite likely some years before that.
It's not a 'company' cable, the company fuse is outside, it used to feed from an outdoor meter/company fuse, it now feeds (after a re-route under the drive) from meter and company fuse in the garage.
It might be pre-metric SWA, the outside diameter is just over 23mm and looks somewhat like black SWA. It's a three core cable with Red, Blue and Yellow insulated cores.
I'd basically like to know what size it is if possible.
I'm not *absolutely* sure that it's armoured cable, was 'non armoured' cable ever used?