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This 20-minute video is a comprehensive evaluation that demonstrates for technicians the distinction between two very similar standards: UL 300 and UL 1254. It covers the history of pre-engineered systems and explains the basic change initiated by UL 300 (UL 1254). This video also outlines the necessity of UL 300 (UL 1254) in conjunction with the hazards of modern commercial cooking technology.
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