Q) Conductivity of metallic covering of a cable (other than flexible cable for portable/transportable apparatus) used in a mine shall not be less than at all parts & at all joints?

As per electricity regulation in a mine the length of flexible Conductivity of largest conductor of the cable
25% of Conductivity of largest conductor of the cable
50% of Conductivity of largest conductor of the cable
50% of Conductivity of all power conductors taken together

📖 Additional Information

Conductivity of metallic covering of a cable (other than flexible cable for portable/transportable apparatus) used in a mine shall not be less than 50% of Conductivity of largest conductor of the cable at all parts & at all joints

Q) Conductivity of metallic covering of a cable (other than flexible cable for portable/transportable apparatus) used in a mine shall not be less than at all parts & at all joints?

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