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formula for cable size calculation for current?

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formula for cable size calculation for current?..

Calculations are same as above but for 50A load

We can use the bellow cables

Aluminium: 50 x 3.5 Core

Cu : 16 x 4 Core

 Is This Answer Correct ? 115 Yes 61 No

formula for cable size calculation for current?..

in case 50amps 230v single phase load we can use 16mm aluminium and 10mm copper

 Is This Answer Correct ? 29 Yes 6 No

formula for cable size calculation for current?..

the answer is not correct the correct figure is 25mmsq

 Is This Answer Correct ? 37 Yes 19 No

formula for cable size calculation for current?..

The current will be 27 A for single phase supply(230v)

 Is This Answer Correct ? 4 Yes 0 No

formula for cable size calculation for current?..

2x10 sqmm Cu/XLPE/PVC 600/1000 v

 Is This Answer Correct ? 17 Yes 16 No

formula for cable size calculation for current?..

SINGLE PHASE FORMULA FOR CABLE SIZING.

REQUIRED DATA:-
I :- AMPERES
L :- LENGTH OF CABLE.
K :- CONDUCTIVITY OF COPPER(58)
:- CONDUCTIVITY OF ALUMINUM (36)
Vd:- VOLTAGE DROP.

GIVEN DATA:
I:- 50 AMPERES.
L:- 100 METERS.
Vd:- 3% ACCEPTABLE OF 230 VOLTS

FORMULA:-
AREA (mm2)= 2*I*L/(K*Vd)
= 2*50*100/(58*6.9)
= 24.98 mm2
= ALMOST 25 mm2
FOR THREE PHASE:
AREA(mm2) = 1.732*50*100/(58*12)
= 12.44 mm2
= ALMOST 15 mm2
3% voltage drop of 400 volts =12 volts.

ABOVE EXPLAINED FOR IS PROPERLT CORRECT.USE AND ENJOY.

M.SC.ENGG.MIEE(UK)
DATE:- 24/3/2014

 Is This Answer Correct ? 2 Yes 2 No

formula for cable size calculation for current?..

230 meter cable

 Is This Answer Correct ? 2 Yes 3 No

formula for cable size calculation for current?..

S=(2.l.i.cosg)/V%

 Is This Answer Correct ? 0 Yes 4 No

formula for cable size calculation for current?..

formula is same but for 50 amp load we can use 3.5c
25mmseq.all.and 10mm seq.cu.

 Is This Answer Correct ? 18 Yes 28 No

formula for cable size calculation for current?..

by the formula p=v*i*cos@
assume the load as 5kw and operating at 230v and also
assume the load as inductive (so the power factor is 0.5
pf lag)

now by formula
5000=230*i*0.5
i=50A
NOW CABLE SIZE MUST BE > LOAD
SO CABLE SIZE IZ 65SQMM(ITZ DSSEPEND ON AL/CU CABLE)

 Is This Answer Correct ? 118 Yes 136 No

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