Product Overview The YYF019 Bunched Cable Vertical Flame Spread Tester is a professional-grade flame test machine engineered to evaluate the fire performance of bunched or grouped cables. It is designed to meet the requirements of IEC 60332-3-10, UL 1685, and EN 50399, making it a reliable instrument for cable manufacturers, testing laboratories, and quality assurance facilities that need to verify flame propagation behavior under controlled vertical conditions. YYF019