Standard CT Chambers are designed to house Current Transformers used to meter LV electrical supplies rated from 200A to 1600A. Versions are available that are combined with a 4P MCCB, which also provide a main point of isolation for an installation.
In June 2013 we understand that there were changes in legislation, which transferred responsibility for the provision of CT chambers. In some instances this has taken the responsibility away from the electrical contractor / installer and passed it to the electricity supplier. Before ordering a CT chamber, please confirm who has responsibility for supplying the CT chamber with your electricity supplier.