please give me a suggestion is correct or not

itis not correct , the cable will over heat .

Hi,

How can i agree the cable become over heat, please give me your calculation

Regards

Sathish

Hi Guest,

Do you want to know your mathematics is correct or cable selection is correct? If it is cable selection then your selection is wrong .Because the basic criteria of selection of cable depend up on so many factors not only voltage drop.

1. The type of insulation ( PVC,XLPE )

2. Continuous current carrying capacity depends on type of cable and laying conditions. It is defined for various categories of cables and type of cable laying( laid in ground, laid in duct , laid in air) by Bureau of Indian Standards IS 1554

Similar standards will be available for BS ( BS 7870 of 2003 )and IEEE standards

( I think it is IEEE 835 of 1994 )You will have to calculate the re-rating factors depending on your conditions.

3. Rating factor depending on variation in ambient temperature

4. variation in rating factor depending on ground temperature if laid directly in ground

5.De rating factor depending on the depth of cable laying

6. Voltage rating and permissible maximum voltage drop

7. Short circuit rating of the cable.

So correct your calculation considering all these factors.