A 60 kV (rms) single core metal sheathed cable is to be graded by means of a metallic intersheath. The safe electric stress of the insutating material is 6 kV/mm (rms). The overal diameter of the intersheath is ________ mm

A 60 kV (rms) single core metal sheathed cable is to be graded by mean

1.	A 60 kV (rms) single core metal sheathed cable is to be graded by means of a metallic intersheath. The safe electric stress of the insutating material is 6 kV/mm (rms). The overal diameter of the intersheath is ________ mm
A.	2.0 mm
B.	20 mm
C.	0.020 mm
D.	200 mm
Answer» C. 0.020 mm

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A 60 kV (rms) single core metal sheathed cable is to be graded by means of a metallic intersheath. The safe electric stress of the insutating material is 6 kV/mm (rms). The overal diameter of the intersheath is ________ mm

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