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Cable table which column to use

Baldyhugh
Hi


Im currently doing a bit of circuit design and am a bit rusty. I’m planning to use a 3 core swa for a single phase circuit. Do I choose the 2core cable single phase column in The regs book current capacity tables even though im using a three core cable or the three or four core cable column? Some of the tables show a little asterix denoting ‘with or without a protective conductor’ which would help in my instance, however table 4d4a doesn’t show this. 

Thanks in advance

Peter
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    Yes, the three core columns are for three phase whether neutral is there or not. I suspect that the asterisk in other tables indicated a test house determination having included and omitted the earth core in their tests. Perhaps the same tests were not run on the swa cables in 4D4A as the earth was traditionally either the armour or a separate core. I an only offer my humble opinion that the inclusion of an integral core for earth in a single phase application would not have a detrimental effect on the current carrying capacity.
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    Yes, the three core columns are for three phase whether neutral is there or not. I suspect that the asterisk in other tables indicated a test house determination having included and omitted the earth core in their tests. Perhaps the same tests were not run on the swa cables in 4D4A as the earth was traditionally either the armour or a separate core. I an only offer my humble opinion that the inclusion of an integral core for earth in a single phase application would not have a detrimental effect on the current carrying capacity.
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