Bharat Insulation Company [India] Ltd. Supplies Polyvinyl Coated Rectangular Wire. Bharat Insulation Company [India] Ltd. Is an ISO 9001:2000 certified company. Polyvinyl Coated Rectangular Wire is used in Bakelite sheets and teak stator winding HIP. Motors. D.C. Field and armature windings, oil or synthetic liquid filled transformers to withstand the combined effect on transformers oil, moisture, automobile starters, Dynamos, Portable electric Tools and domestic appliances motor.