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Aluminium/Copper Split Con

AncientMariner
I have been trying to find either a table or current figures for split-con cable where the Live is 25mm2 Aluminium (single core) and both the Neutral (7 strand) and Earth (5 strand) are 16mm2 Copper. This split-con used by Scottish Power in their MANWEB area circa 2002. Google has not been my friend...


I am interested in current ratings for buried in the ground and within a hockey stick (in wall cavity) and the max BS88 fuse that could be used by the DNO to protect - currently an 80 amp.

Thanks.

Clive
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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.



    Good, that does sound like "ordinary" Al/Cu spit con to me - so that data sheet (above) should be applicable.

      - Andy.

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    (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


  • 0
    Well spotted Mike!

    Never had to do any bailing at sea. One of the perks when I was a Radio Officer, was being in the location where I would be one of the last to get their feet wet...

    That changed once I became a Technical Officer. Remember one afternoon walking down a side passage way on a container-ship - outboard of the holds beneath the main deck and found that a fire main joint had failed and was trying to fill the passageway with seawater.  Rather amusingly, the port and starboard side passage ways were connected with a passageway running across the ship. For reasons known only to the ship builder, they had quite correctly fitted a water-tight door - the sort with four dogs around the edge to clamp the door into the frame that was set in the bulkhead. But had then gone and spoilt the water-tight integrity by cutting triangular sections out of the bulkhead, which sort of negated the purpose of a water-tight door....

    Clive
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    "But had then gone and spoilt the water-tight integrity by cutting triangular sections out of the bulkhead, which sort of negated the purpose of a water-tight door.... "


    I bet it was bugging you as to the reason. It`s bugging me and I`m not much of a seafairer - Isle of Man on Ben Machree type . It sure would be interesting to know the reasons
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    Reminds me of going round a ship for an inspection during construction of the cable transits through watertight and/or fire division bulkheads. There was one where everyone checked the cable transit was properly filled in to make it watertight/firetight but I pointed out it wasn't much use as next to it there was a large pipe going through the bulkhead that had a f***** ¹ big hole cut in the bulkhead to let it pass through. The reality is some people know what they are doing, others just do what makes it easiest for them.


    ¹ For sensitive folks, the word is of course "fairly"
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    Alasdair Anderson:

    ¹ For sensitive folks, the word is of course "fairly"



    ???

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