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The Centre Conductor is a single Aluminium 5.6 mm in diameter, with Red insulation giving an overall diameter of 7.6 mm. Equals 25 mm2.
There are 7 Black covered cores of 1.7 mm diameter Copper, with an overall diameter of 2.23 mm, Equals 16 mm2.
There are 4 (NOT 5 as I posted previously) bare Copper cores each 2.25 diameter. Equals 16 mm2.
(Similar to bailer twine - there's a word from my farming past...)
Surely 'baler twine' from farming - hay bales and all that. (though we also used the stuff to string up soft fruits at the farm in Billericay I worked as a student)
Perhaps 'bailing ' is a word from your seafaring days ? though we hope not...
25/16 alu/copper will be more or less standard regardless of make. Normally find it feeding up to one 100A, or maybe 2 60A feeds, anything more would be more likely 35mm
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