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Its been long since I was in college doing cable calcs and obeing onsite as I've studied a completely different course at university, I understand de-rating factors but need some clarifying up to brush up.
If I need a 600A supply which can be split 200A each phase. and being supplied via SWA underground over a distance of 200m at a depth of 0.8 to a sub dis board.
When doing cable calcs do I use 200A or 600A?
And when reading cable datasheets for 3 phase reference method d - 1|thee or 1 four-core cable three-phase AC , does the data in the table refer to each phase ie. as 1mm2 - 21A per phase or 7A.
Bit of a stupid question
Thanks for your help.
If I need a 600A supply which can be split 200A each phase. and being supplied via SWA underground over a distance of 200m at a depth of 0.8 to a sub dis board.
When doing cable calcs do I use 200A or 600A?
And when reading cable datasheets for 3 phase reference method d - 1|thee or 1 four-core cable three-phase AC , does the data in the table refer to each phase ie. as 1mm2 - 21A per phase or 7A.
Bit of a stupid question
Thanks for your help.