Internal Type Switch Board Cable has electrolytic copper bare/ tinned conductor and is available in sizes from 0.4 to 0.9 mm. The Cable has PVC insulation suitable for 70 ° c/ 85 ° c/ operation and insulation of medium/ high density polyethylene. The Cable has multi pair formation; polyster/ PVC made binder tape and has screening of aluminium mylar tape with 100% coverage. The Cable has galvanized iron wire/ strip along with drain wire made armour and PVC/ polyethylene/ FRLS PVC made inner/ outer sheath. The Internal Type Switch Board Cable has number of pairs from 1 to 100, minimum thickness of sheath from 0.50 to 1.40 mm, maximum outer diameter from 3.50 to 22.80 mm, approx net weight from 12.20 to 696 kg/ km, round galvanised iron wire of 1.40 mm, flat galvanised iron made strip of 0.8 X 4.0 mm, thickness of sheath nominal from 1.80 to 2 mm.
