New standards and test: Tests for hermetic motor wire

When NEMA MW-1000 was published in 1967, several test procedures were inserted in Part 3 to cover measurements of refrigerant resistance. Solvent extraction procedures were covered in paragraph 2.4.5, Refrigerant 22 softening in paragraph 2.4.8, and Refrigerant 22 blister resistance in paragraph 2.4.9. These test procedures were intended to cover the essential hermetic quality characteristics of magnet wires insulated with films composed primarily of polyvinyl formal resins.