how calculate cable size in squre mm, when the load is
given by in kw? do u have current rating chart of elctrical
cables?
- 4 Answers
- 10981 Views
- I also Faced
- E-Mail Answers
Answer Posted / abdul rahman
While all loads are given in KW,only current matters while calculating cable sizing assuming voltage remains constant neglecting minor fluctuations.
From power equation once u find the load current you decide the cable sizing.As a thumb rule 1sq mm of Cu carries 2.4A whereas Al carries 1.4A.
For example a 100kw load requires nearly 180A current.The cable sizing would be 4core X 95 sqmm Cu plus 1core 50 sqmm ECC.
Different manufacturers have their standard sizes hence the value main differ slightly but the thumb rules will help u.
| Is This Answer Correct ? | 0 Yes | 0 No |
Post New Answer View All Answers
Importance of fault current in power transformers and how to monitor the same? How is it different from winding temperature?
Hi I'm doing my MBA(3rd semester).I applied for the post of ET conducted by BHEL the last year.I cleared the written and lost in personal interview.Again I wrote the exam this time and cleared the written n yet to take the personal interview.Shall I disclose in the interview about my studies.What shall i say if they ask about my change from studies to job
what is meant by rotating magnetic filed
How are load losses and no-load losses measured at site in a DG set?
What is different type of Electrical curve and how it protects the equipment's while up-normal situation?
Battery is a voltage source? give one example of current source and why?
WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.
at meter room 50 hrc switch installed,but there are not get earthing proper,so what happen?and 11kv transformer out put going in to hrc main 400a three nog each? so earthing is require for all switch? (some customer made earthing at there home.)
why do we have spikes enough to burn electronic boards, when generators are not grounded
what is difference between cpp electrical system and refinery electrical system
what is the reactive power what is the use of it in system
Which capacitor is preferred for high voltage and frequency?
Explain the experiment on ward leonard method of a speed control on a dc shunt motor with an suitable circuit diagram.
how to test the electrical panel.ht lt mcc pcc.
For a spring controlled governer the relation F = ar+b (F is the controlling force, r is the radius of rotation a and b are constants), indicates that the governer is
