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Question
```How can CALCULAT the current carrying capacity of aluminum
and cOpper cables respective of that Sq.mm  ? with
formulas ?```
Question Submitted By :: Mani E
I also faced this Question!!     Rank Answer Posted By

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 1
Measure the load connected in that cable
 Is This Answer Correct ? 44 Yes 56 No
Manoj

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 2
read the datasheet of cable factory, don't play smart with
formulas, u stupid dumbass

 Is This Answer Correct ? 27 Yes 51 No
Amitamit Makanbacem

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 3
As we know that Resistance of conductor is calculated by

R= row*l/a
where row=specific resistance of the conductor i.e
aluminium and copper(depends of material)
l=length of the conductor
a=area of cross-section of the conductor.

And as we know that the conductivity of the aluminium
conductor is <=1 (depends upon the distance of the cable
laid avg.0.8-1) and conductivity of copper is <=1.5
(depends on cable laid. avg. 1.2-1.5).

for ex.take cable length of 180 sq.mm Al. cable

if we want to know the current carryng capacity is
180*o.9=168 A approx.

 Is This Answer Correct ? 19 Yes 24 No
Sbb

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 4
Generall we are consider for Cu 1.5A 1.6 A / SQ MM
and AL 0.8A/ sQ MM

 Is This Answer Correct ? 21 Yes 30 No
Bala

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 5
Use of formula is always a cumbersome exercise.
In pactical 1.5A/sqmm for al,cable & 2.5A/sq.mm is
considered in practical way. means a 50sqmm Al cable will
carry at least 75A and same size copper cable will carry
125A.

 Is This Answer Correct ? 32 Yes 17 No
Manoranjan

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 6
1.0 To 1.5A/sqmm for al,cable & 2.0 TO 2.5 A/sq.mm is
considered in practical way. means a 50sqmm Al cable will
carry at least 75A and same size copper cable will carry
125A.

 Is This Answer Correct ? 15 Yes 9 No
Gaurav

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 7
Check the CCC by any supplier's brochure.
Derate the CCC on the following parameters
Maximum Ambient temp.
Cable buried UG / on air
185 mm2 4 c Alu XLPE cable's ccc = 200 Amps in the Gulf.

 Is This Answer Correct ? 2 Yes 3 No
Martin

Re: How can CALCULAT the current carrying capacity of aluminum and cOpper cables respective of that Sq.mm ? with formulas ?
# 8
Thumb rule
For Al Conductor Cable Multiply Sq mm size by 1.5.
&
For Cu cable Multiply sq mm size by 4.
e.g.
70 sq mm Al Cable can take 70×1.5=105 A
&
16 sq mm Cu cable can take 16×4=64 A

 Is This Answer Correct ? 5 Yes 4 No
Satish

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