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What is an 'SCAL-CU' cable?

gullanedave

Hello,

Looking over some old drawings for a project, and note that there is a cable type designated as 'SCAL-CU'. 

Does anyone know what that is?

It is listed as 7x 300 SCAL-CU for the incoming cables to a 2000A rated switchboard.

Obviously the CU is for copper, but what does the SCAL bit mean?

Thanks.

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    Possibly Steel covered ,  aluminium-copper.

    So with an armour like SWA, and then either copper coated aluminium or a mix of copper/ alu cores. Sounds like the sort of thing that is a marvellous cost saving, until it gets wet and electrolytic things happen to the aluminium bits. Copper covered Aluminium has not been in favour for a while due to a tendency to fail at the wrong moment.

    How old are the drawings ? 300mm maybe 400A per core, so 7 for 2000 amps seems an odd choice. It may not be metric or it is a part no and not a size.

    It is important that the steel armour encloses equal flow and return currents - So I'd expect it to be 3 or 4 core. If it isn't then in this case "SC" is not  "steel covered", but something else - do you have a photo  of it ?

    Mike.

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    Possibly Steel covered ,  aluminium-copper.

    So with an armour like SWA, and then either copper coated aluminium or a mix of copper/ alu cores. Sounds like the sort of thing that is a marvellous cost saving, until it gets wet and electrolytic things happen to the aluminium bits. Copper covered Aluminium has not been in favour for a while due to a tendency to fail at the wrong moment.

    How old are the drawings ? 300mm maybe 400A per core, so 7 for 2000 amps seems an odd choice. It may not be metric or it is a part no and not a size.

    It is important that the steel armour encloses equal flow and return currents - So I'd expect it to be 3 or 4 core. If it isn't then in this case "SC" is not  "steel covered", but something else - do you have a photo  of it ?

    Mike.

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