Cable transits are sealing systems which seal and protect cable and pipe transits against fire, smoke, gas, water, etc. A cable transit is used for protecting against the ingress of liquids and electromagnetic disturbances or interference at a wall transit location within a wall. Cable transits are generally modular systems including outer frames (at least one module-based cable seal and a final seal which fills out the frame together with the cable seal) such as two semi-cylindrical bodies that are made of a compressible material and that together fit into the internal cavity of the sleeve. A cable transit has an adaptable center hole for accommodating a cable to be passed through the wall. The semi-cylindrical bodies of transts have several layers that can be peeled one from the other. The outer frame includes resilient packing pieces which function to firmly clamp the cables, and a combination of wedges which when pushed together exert pressure on the packing pieces, and a tensioning device which functions to lock the wedge combination. Cable transit accessories also include sealing plugs, and appropriate insulation, putties, and foaming materials.
