Nylon 6.6 has been since the past 40 years as a production of the insulating material of the conductor casing and Terminal Blocks or connector attachment.
 

Nylon material is recognized by almost all international testing agency. Because it has excellent resistance to leakage current breakdown of the ability to achieve CTI 600, in accordance with IEC 112 standard, thereby reducing air leakage current crawling distance, which can be manufactured out of smaller components.

Electronic components produced by the electrical industry as far as possible to achieve environmentally sustainable development, The McNair Electric Company modified nylon 6.6 do not contain halogens, fluorocarbons. It is non-corrosive, self-extinguishing, and allowed to ensure the stability of the temperature at a temperature of 105 ° C continuous work.