Multiple Earth Electrodes in a Tt System for a Dwelling

The need for a TT System There are occasions when the electrical supplier will not provide a means of earthing with a new electrical supply to a building. This is quite acceptable, as regulation 24 (4) the Electricity, Safety, Quality and Continuity Regulations (ESQCR) states that if the supplier can reasonably conclude that it is appropriate, for reasons of safety, then a means of earthing could be refused for a new connection. An example of this could be a house situated in the countryside which receives its electrical supply from an overhead line. The overhead supply consists simply of a phase and a neutral conductor. The supplier may state that, for safety reasons, a means of earthing for the consumer’s installation will not be provided. The owner of the installation must then provide their own means of earthing. In this instance, an earth electrode, or electrodes, could be installed to provide the means of earthing and, hence, the installation becomes part of a TT system.