Answer / guest

N=3L(L-1)+1 Where N=No of strand L=No of layer of cable. ie A single layer(single strand) N=3*1(1-1)+1=1 A double layer cable N=3*2(2-1)+1=7 And in three layer cable N=3*3(3-1)+1=19 And . so on ........ But Now-a-days some manufacuture company does not supply the exact size (No of strand) of cable for economic benefit.

Describe Non I.S. Earth System and why is it used?

0 Answers   KPJV,

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A parallel flow heat exchanger will perform better than a counter flow heat exchanger. State if the statement is true or false.

0 Answers   Blue Star,

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I have carried out wiring for lighting in a shed in Industrial area which contains Metal halide lamps & have balanced in 3ph.Now when we put all the lines on in the daytime the current taken at 3phases at MCB comes to be equal i.e.28,29,28Amps respectively but in the night time i.e between 7p.m.to 11p.m. at the same MCb the current is 52,59,62Amp, though I have fit 63A MCB it is tripping in the above period.What may be the reason.? Note: This industry is located in industrial area where majority of steel ingot manufacturing plants are there. Whether this may be due to harmonic? what should I do to overcome above problem.pl suggest urgently.

4 Answers  

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In a closed circuit if two 5volt power supplier are connected in parrel what is the current direction in tihs circuit?

1 Answers  

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what is the permissible bend in the LT& HT CABLES.

2 Answers  

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How many types of colling system it trformers?

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IF I USED VVVF DRIVE IN FAN APPLICATION MOTOR IN 6.6 KV ( 700 KW) MOTOR & DURING NORMAL RUN OPERATION TIME IF RPM SUDDENLY REDUCE IN MOTOR BY DRIVE(E. MOTOR RPM REDUCE SUDENLY 687 TO 550 RPM) WAHT WILL BE HAPPEND IN DRIVE

1 Answers  

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why Transformers power mentioned in KVA?. and why Generators and Motors power mentioned in KW?.

10 Answers  

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How do you calculate of power factor, if it is lagging or leading for unit(1).

4 Answers  

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1.difference between sts & ats? 2.what is fm200 system brefly explain?

1 Answers   Ericsson,

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A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

0 Answers   Siemens,

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What difference between voltage and current

5 Answers  

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