Graphite is generally used as a conductive coating to enable a sheath test in the field or on the drum, where the cable may not be in contact with an earth medium (eg in conduits, or direct laid in non conductive trenches, or maybe sitting in insulated cable racks in tunnels). It gives it a continuous potential for the sheath test so the whole of the sheath insulation can be tested for damage during installation
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Royce Metal Products Ltd. presents a new standard in copper and stainless steel coating pan for candy, food and pharmaceutical industries. candy coating drum
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