The following changes in requirements to UL 499 are being proposed: 1. Addition of Alternative (IEC) Grounding Symbol, 2. Elimination of "A" from "W-A" Suffix for Outdoor Power Supply Cord Designations, 3. Additional Requirement Intended to Exempt Industrial Ovens and Furnaces From the Requirement That Resistance Heaters Larger Than 48 Amperes Be Broken Down Into Subdivided Circuits Not to Exceed 48 Amperes, 4. Additional Marking and Instruction Requirements for Steam Bath Steam Generators Relative to the Effects of Steam and Heat.