A method for sealing a drop cable in a cable splice enclosure which includes an enclosure base having an open-ended entry hole for receiving at least a drop cable for passing the cable into an interior region of the enclosure for subsequent splicing, the method comprising: at a site exterior to the enclosure, providing a compression grommet assembly which includes a compressible grommet disposed between an upper pressure plate and a lower pressure plate , at least one passageway extending in alignment through the upper pressure plate , the grommet , and the lower pressure plate ; and an adjustable connector assembly adapted to apply pressure to the grommet to compress the grommet depthwise between the upper and lower pressure plates , when adjusted; passing the cable through the passageway in the grommet assembly from a position exterior to the enclosure; positioning the grommet assembly in the entry hole contained in the enclosure base , from a position exterior to the enclosure base , and passing the cable into the enclosure; locking the grommet assembly in the entry hole , from a position exterior to the enclosure; and adjusting the adjustable connector assembly to compress the grommet in the entry hole so that the compressed grommet applies a holding force to seal the grommet in the entry hole and, at the same time, to seal the cable in the passageway through the grommet , characterized in that the grommet assembly is loosely fitted into the entry hole when positioned therein and subsequently moved to a locked position in the entry hole in a relaxed or unsealed state before the adjustment step that completely compresses the grommet , and wherein the grommet assembly is locked by a profiled outer edge of one of the pressure plates that is keyed to a cooperating profiled interior surface of the entry hole of the enclosure base . at a site exterior to the enclosure, providing a compression grommet assembly which includes a compressible grommet disposed between an upper pressure plate and a lower pressure plate , at least one passageway extending in alignment through the upper pressure plate , the grommet , and the lower pressure plate ; and an adjustable connector assembly adapted to apply pressure to the grommet to compress the grommet depthwise between the upper and lower pressure plates , when adjusted; passing the cable through the passageway in the grommet assembly from a position exterior to the enclosure; positioning the grommet assembly in the entry hole contained in the enclosure base , from a position exterior to the enclosure base , and passing the cable into the enclosure; locking the grommet assembly in the entry hole , from a position exterior to the enclosure; and adjusting the adjustable connector assembly to compress the grommet in the entry hole so that the compressed grommet applies a holding force to seal the grommet in the entry hole and, at the same time, to seal the cable in the passageway through the grommet , characterized in that the grommet assembly is loosely fitted into the entry hole when positioned therein and subsequently moved to a locked position in the entry hole in a relaxed or unsealed state before the adjustment step that completely compresses the grommet , and wherein the grommet assembly is locked by a profiled outer edge of one of the pressure plates that is keyed to a cooperating profiled interior surface of the entry hole of the enclosure base . <EOS>