Answer / bala.a

Mr. Virendra this formula is applicable for busbar only
not for cables . as per your statment 10 sq mm cu cable
suitable for 16 A only . PLEASE GO AND CHECK with cable
manufacture catalouge. the 10 sq mm Al cable suitable for
+_ 40A .

Answer / amarnath

As per standards for Aluminium cable 1sq.mm can carry 1A.
and in case of Copper cable 1 sq.mm can carry 4A.

If theres any formula to calculate please do let me know as
well....

Answer / anilkumar

As per standred there is no formula, its only depend on
cable manufacture cataloge and we following same as what
amarnath said AL cable current carrying 1A per SQMM and
copper cable carring 4A per SQMM.

Answer / murugadoss.a

Dear all please consider the length of the cable and voltage droup. Depends on the size the resistance value should be varies. For 3 phase 3.2% valtage droup allowed and 1 phase system 2.5% valtage droup alowed. before going to select the cable size to consider these all.

Answer / virendra

current carring capacity might gets slight change dependign
upon the manufacture. but in coomon practice as amarnath
said Aluminus takes 1A per sq.mm but for Copper it is 1.6 /
sq.mm

why there using acb enclosure in big buildings

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