Hi

[robertoj]

Im trying to calculate size of CPS conductors!!! I have a formula s=ⱱI²xt/k example: s=Ѵ300²x0.6/115 It gives me 1.56mm²??? On a calculator is 21.66?!

where I am doing mistake Someone can explain to me??? Thanks

 

[KAS1]

Hmmmmmmmm I got 2.02mm I must be doing something wrong as well!!!!

 

[Badged01]

Multiply 300 x 300 x 0.6
Take the root of this
Then divide by 115
Answer is ....

- - - Updated - - -

Hmmmmmmmm I got 2.02mm I must be doing something wrong as well!!!!

Sounds about right!

 

[zap]

Hmmmmmmmm I got 2.02mm I must be doing something wrong as well!!!!

Same as...

 

[zap]

Im trying to calculate size of CPS conductors!!! I have a formula s=ⱱI²xt/k example: s=Ѵ300²x0.6/115 It gives me 1.56mm²??? On a calculator is 21.66?!

where I am doing mistake Someone can explain to me??? Thanks

Use brackets to simplify the equations:

(SQRT(300 x 300 x 0.6))/115

Do the inner brackets first. The same as post #3.
Hope this helps.

 

[robertoj]

still the same 2.02 ?? why books show 1.56???

 

[zap]

still the same 2.02 ?? why books show 1.56???

Book's wrong.

 

[KAS1]

Printing error

 

[Badged01]

Trick question!

 

[robertoj]

so 2.01 is correct?

 

[zap]

so 2.01 is correct?

Does your abacus have a current calibration certificate?

 

[robertoj]

is ok thanks for help...