The CAI has three categories for installing members.

Domestic Installers A 'domestic' installer undertakes the installation of TV, Satellite and Radio Aerials for the single dwelling environment.

System Installers In addition to that of the 'domestic' installer a ‘systems’ installer undertakes the installation of TV, Satellite and Radio signal distribution in multiple dwelling units such as blocks of flats or commercial premises.

CAI Approved SMATV Installers These are companies who have individual engineers who have achieved City and Guilds / CAI certification in design and installation of signal distribution systems