charzree
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Hi All, this is regarding cable sizing and protective device selection in a switchboard. I'm very new to the British standards, kindly help me out to understand the basics in the attached schedule.
1) What is Id?
2) What is Igt end of line?
3) What is I2t start of line? Why is it calculated only for Phase conductor? Is it mean the cable impedance is calculated for the first few metres of the cable from the switchboard?
4) What is I2t end of line? Why is it calculated for neutral conductor?
5) What does Lmax mean? Is it the maximum length that is permitted for a particular cable size to not to exceed the allowable voltage drop?
1) What is Id?
2) What is Igt end of line?
3) What is I2t start of line? Why is it calculated only for Phase conductor? Is it mean the cable impedance is calculated for the first few metres of the cable from the switchboard?
4) What is I2t end of line? Why is it calculated for neutral conductor?
5) What does Lmax mean? Is it the maximum length that is permitted for a particular cable size to not to exceed the allowable voltage drop?
