Bharat Insulation Company [India] Ltd. Offers Dual Coated Rectangular Wire. Bharat Insulation Company [India] Ltd. Has achieved an ISO 9001:2000 certification. Dual Coated Rectangular Wire is suitable for all class "H" [200oC] and above applications such as dry type transformers, AC/DC Alternator Motors and Turbo generators and suitable for traction motors. Dual Coated Rectangular Wire is available with polyester or polyester imide over coated with polyamide-imide.