Ключевые слова:
Switches, Lamps, Screw lamp caps, Watertightness tests, Heating tests, Fire tests, Marking, Dimensions, Thermal testing, Corrosion tests, Mechanical testing, Testing conditions, Electrical insulation, Lighting equipment, Electrical safety, Clearance distances, Protected electrical equipment, Lamp caps, Dielectric-strength tests, Electrical testing, Edison screw threads