I don't think it really helps to make the 'instructions' any less incomprehesible, but no-one seems to have observed that this abomination is presumably directed at US readers - so maybe AC/DC converting jump boxes haven't yet got across the Atlantic
Kind Regards, John.
Do they have ring circuits in the US? (Radial circuits, or ring circuits, are a chain of interconnected circuits with separate conductors, in case you were wondering)
Edit: Paul_C beat me to it and commented more thoroughly on the angloisms in the article. Although the writer does americanise millimetre.