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EN60204 and twin ferrules

Dave in the shed

Hi All,

EN60204 states: "The connection of two or more conductors to one terminal is permitted only in those cases where the terminal is designed for that purpose." Does anybody know whether this prohibits the use of standard twin ferrules (where two wires are crimped into a single ferrule) or whether the assembly of two wires and a ferrule is somehow considered to be a single conductor in the eyes of the standard?

Twin ferrules seem to be commonly used in machine building, often with claims of compliance with 60204. I was expecting to find some easily accessible guidance/knowledge/definitions regarding this situation but my web trawl hasn't found much.

Any wisdom will be gratefully received. Thanks.

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    Well the key is "where the terminal is designed for that purpose." I can imagine an unlikely but possible  situation where one terminal is so close to its neighbours that a large funneled bootlace ferrule does not fit, but apart from that, if the terminal can accept ferrules, then if the strands in the tube come from more than one wire, or not, is not important- it is the ferrule that is sized  to do that.

    So are your terminals suited to ferrules at all, and if so is there enough room to fit a dual entry one without collisions? In your place I might drop an email to the makers of the terminals you have in mind checking that ferrules of that style are OK.

    Mike.

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    Well the key is "where the terminal is designed for that purpose." I can imagine an unlikely but possible  situation where one terminal is so close to its neighbours that a large funneled bootlace ferrule does not fit, but apart from that, if the terminal can accept ferrules, then if the strands in the tube come from more than one wire, or not, is not important- it is the ferrule that is sized  to do that.

    So are your terminals suited to ferrules at all, and if so is there enough room to fit a dual entry one without collisions? In your place I might drop an email to the makers of the terminals you have in mind checking that ferrules of that style are OK.

    Mike.

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