What materials are commonly used as cushions between cable insulation and metallic armor?

What materials are commonly used as cushions between  cable insulation and metallic armor?
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1 Answer

Answer :

Jute and Asphalt coverings.
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A cable of core radius 1.25cm and impregnated paper insulation of thickness 2.13cm and relative permittivity 3.5. Compute the capacitance of the cable/km(in nF) a) 195.7 b) 179.5 c) 157.9 d) 197.5

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If a cable of homogeneous insulation has a maximum stress of 10 kV/mm, then the dielectric strength of insulation should be (a) 5 kV/mm (b) 10 kV/mm (a) 15 kV/mm (d) 30 kV/mm

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