PDF Standards IEC 61020-4-2 Ed. 1.0 b:1995
Electromechanical switches for use in electronic equipment – Part 4: Sectional specification for lever (toggle) switches – Section 2: Detail specification for one pole, two pole, four pole, sealed lever (toggle) switches, 277 V a.c. maximum, 30 V d.c. maximum, 20 A maximum electrical rating
standard by International Electrotechnical Commission, 08/22/1995