Designing homes to conserve energy and use it efficiently, from sources that cause least environmental harm.


Internal lighting and power outlet locations must be determined and types and sizes of wiring selected. The wiring must be designed to meet the electrical load requirements but should allow for future expansion.

Coordination of installation with other trades is essential before the prewire starts. Before construction starts, temporary power must be installed to the site. The main power supply, phones and external services must also be organised and installed.