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I assume that Sweden follows the rest of Europe in specifying 1.5 as the smallest allowable cable ???

I'm curious now. When did Sweden adopt the brown, blue. green/yellow system? What did you use before?

Yes, 1.5 sqmm is the smallest and most common size. (Socket outlets are on 10A circuits)

I think the colour code changed ca 1970. Previously the earth was red, but this was made illegal in 1972. I don't know if the rest of the old colour code was outlawed or simply not used anymore. Anyway, it was (when wired to code):

Live: black, blue, yellow, green or grey. (Other colours may have been used too.)
Neutral: white
Earth: red

I've seen red used as both live and earth in the same junction box. But then, I've seen green/yellow used in the same way. [Linked Image]