There is no hygroscopic material to be used as electrical insulation in product, as specified in IEC 60950-1, Clause 2.9.1. If polymeric material used as insulation in product, which in contact with electronic components where have latent risks to generate heat or fire under fault conditions, it shall be rated at a minimum 94V-0, otherwise internal polymeric parts are acceptable to be rated at a minimum 94V-2. Vendor should provide the UL card for such parts.