That would explain how they wired this ...
Full size which I copied over from
here . Sinegoriye in the Russian Far East. The 'grounded' extension has been wired with two core cable. How they keep track of which is neutral when beneath the single grey insulation there are just two identical silver aluminium wires, I do not know!
[This message has been edited by Hutch (edited 09-30-2004).]