[IHOORA MICHAEL]

I agree with you sir, for me am a substation attendant and every thing is possible with use of circuit breakers, regarding resetting in case of a trip and faults are easy to identify with the use of CBs. Imagine of a fuse blowing and you want to replace it, you will take alot of time de-assembling and assembling the components in order to replace the fuse.

[IHOORA MICHAEL]

My regards;

   The number of down
conductors can be determined as follows:

1-One conductor for a structure whose base area does not
exceed100 sq m

 

2-Determine the whole numbers N1 and N2, and select the
smaller of the two

       
N1=1+(A-100)/300

 

        N2=P/30

 

  Where N=whole number
of the working area

              A=base
area of the structure in sq m

             
P=perimeter of the structure in m

 

3-Where the height of the structure is more than 30m in
height, additional considerations             to
the above should be applied.

[Author]

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