Rationale

Correction to "Table 1" testing conditions for code letter "G". "G" refers to conventional grades that must be tested at 1.5T and not 1.7T as per ASTM standard A876. Last sentence to be reworded: "The three digit grade designation is based on the specific core loss reference value in W/lb at 1.5 T (15 kG) and 60 Hz."