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Question
formula for cable size calculation for current?
 Question Submitted By :: Nstailor810
I also faced this Question!!     Rank Answer Posted By  
 
  Re: formula for cable size calculation for current?
Answer
# 1
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 ?    116 Yes 135 No
Gurunadharaov
 
  Re: formula for cable size calculation for current?
Answer
# 2
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 ?    103 Yes 60 No
Govardhana Rao.p
 
 
 
  Re: formula for cable size calculation for current?
Answer
# 3
the answer is not correct the correct figure is 25mmsq 
Is This Answer Correct ?    35 Yes 19 No
Zafar
 
  Re: formula for cable size calculation for current?
Answer
# 4
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
Vinay Katoch
 
  Re: formula for cable size calculation for current?
Answer
# 5
2x10 sqmm Cu/XLPE/PVC 600/1000 v 
Is This Answer Correct ?    14 Yes 16 No
Fathi
 
  Re: formula for cable size calculation for current?
Answer
# 6
in case 50amps 230v single phase load we can use 16mm aluminium and 10mm copper 
Is This Answer Correct ?    20 Yes 5 No
Sabu
 
  Re: formula for cable size calculation for current?
Answer
# 7
S=(2.l.i.cosg)/V% 
Is This Answer Correct ?    0 Yes 4 No
Lorp Soophan
 
  Re: formula for cable size calculation for current?
Answer
# 8
230 meter cable 
Is This Answer Correct ?    0 Yes 2 No
Selvakumar
 
  Re: formula for cable size calculation for current?
Answer
# 9
The current will be 27 A for single phase supply(230v) 
Is This Answer Correct ?    2 Yes 0 No
Bipin Naik
 
  Re: formula for cable size calculation for current?
Answer
# 10
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.

ENGR.MUHAMMAD YOUNAS KHAN
M.SC.ENGG.MIEE(UK)
WAZIRABAD CITY,PUNJAB, PAKISTAN
DATE:- 24/3/2014
 
Is This Answer Correct ?    1 Yes 1 No
Engr.muhammad Younas Khan
 

 
 
 
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