Cable trays penetrating walls need to be sealed off
When cable trays pass through walls or floors, seal openings using fire-rated penetration sealing materials. According to the test standard EN1366-3 for penetration seals (cable and pipe penetrations) a mixed penetration seal is defined as a penetration seal intended for penetrations where more than one type of service passes through. 3M Fire Barrier Moldable Putty+ is a one-part, halogen-free product designed to firestop electrical outlet boxes and a wide variety of through-penetrations including cable, conduit, insulated pipe and metal pipe, which penetrate fire-rated construction.
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