EMI/EMP electrical cable penetration seal

Claim 1

For use in providing transit of a cable or cables through an opening in a bulkhead, each of the cables having sheathing including an electrically conductive shield which is exposed at least in the area where the cable passes through the bulkhead, the bulkhead including an electrically conductive shield for the environment encompassed by the bulkhead, a system for retarding the transmission of electromagnetic interferences (EMI) and electromagnetic pulses (EMP) through the opening comprising: an integral housing of uniform internal cross-sectional configuration and of conductive material receivable in the opening in a bulkhead, the housing having a cable receiving passageway therethrough; means for electrically engaging said housing with a bulkhead electrically conductive shield around the full external perimeter of said housing; means of removably and sealably closing each end of said cable receiving passageway providing a cavity area within said housing passageway intermediate the closed ends providing means for receiving at least one shielded cable therethrough having at least a portion of its conductive shield exposed to the interior of the cavity area; electrically conductive material selected from the group consisting of electrically conductive powder, granules, pellets, grease, liquid or a mixture thereof; and said electrically conductive material filling said housing cavity area and electrically communicating the conductive shield of each cable received therein with said housing wherein said housing has at least one opening therethrough intersecting said passageway providing means for depositing said electrically conductive material therein.