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protection of electrical boxes
the INTUMESCENT SHEET “GB-DEV” consists of an intumescent element whose specific function is to maintain the fire resistance rating of the wall when discontinuities such as junction boxes are introduced. In the event of fire, the thermal action causes the material to expand to protect boxes for electrical installations. In the event of fire, recessed electrical boxes are points at risk of fire passage and therefore of circumvention of the fire compartmentation; in fact, they are recessed into the walls and at that point the thickness interposed to the fire is no longer the one that guarantees the fire classification, so it becomes necessary to protect them. The INTUMESCENT SHEET “GB-DEV” placed to protect the box makes it possible, through its insulating power, to protect that point with an EI 120 classification.
WALLS
The contents of this page are summarised from the official technical data sheet PDF, which remains the reference document.