No as there is no test to prove a ‘smoke seal’ but we do have test reports to prove our boards are protected to iP56 & IP66 and this meets the requirement to stop the spread of smoke at IP5X.N.B. a DB mounted in a dedicated cupboard that has a smoked sealed door to the National Building Codes would be the only real way to say a DB has a smoke seal.
(Source and more details in “Custom Distribution Boards, Common Questions, Myths and Legends”)

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