This study book covers the following topics on installation and Commissioning: supply, overcurrent and earth fault protection, the electrical information required, selection of conductor size, selection of cable and protective conductors, preparting for commissioning, testing, alarm systems, and fault location.Stage 1 Design also includes a circuit design project. Circuit 1 has been completed to aid students in completing circuits 2, 3 and 4 at the relevant stages in the book. Self-assessment questions and an end test are included so that progress can be monitored.The intermediate Course books cover the knowledge requirements for the City & Guilds of London Institute 2360 Electrical Installation Scheme, Part 2 and NVQ level 3.