Question

The capacitance between any two conductor of a 3 core cable with sheath earthed is 3 microfarad the capacitance per phase will be

Answer 1

The capacitance between any two conductor with sheath earthed is 6 $\mu$f  

Explanation:

Given as :

For 3 core cable

The capacitance of sheath earthed = $C_e_q$   = 3 $\mu$f

Let The capacitance between any two conductor = $C_N$  $\mu$f

According to question

Two core is bunched with the sheath and the capacitance is measured between them .

∵The capacitance between any two conductor with sheath earthed = 2  $C_e_q$

i.e  $C_N$  = 2 × 3 $\mu$f

∴   $C_N$  = 6 $\mu$f

So, The  capacitance between any two conductor with sheath earthed =  $C_N$  = 6 $\mu$f

Hence, The  capacitance between any two conductor with sheath earthed is 6 $\mu$f   Answer