Residential control boxes are relatively small regulators deployed in homes and residential complexes to manage domestic electrical systems. The fuse boxes or breaker panels you have come across in your apartment are most likely residential control boxes.
Wrapping tape on a high voltage cable can be time consuming and error prone since the careful build-up of tape requires accurate half-lapping and constant tension in order to reduce build-in air voids. Rubber tapes are designed to stretch−some up to 1000%. Elongating the tape this way drives to compression, and that results in the strong self-fusion that provides great insulation and moisture protection.