This fact sheet explains how to apply the requirements shown in AS/NZS 3012:2019 Electrical installations – construction and demolition sites (AS/NZS 3012:2019), which is called up as a mandatory standard by section 163 of the Work Health and Safety Regulation 2025 (WHS Regulation). The standard. In a newly constructed residential area, a 10kV power line is introduced into the substation. After stepping down the voltage through the transformer's low-voltage side (0. 4kV), power distribution is achieved through three levels of distribution boxes: the main distribution board, secondary. WorkSafe Victoria acknowledges Aboriginal and Torres Strait Islander people as the Traditional Custodians of the land and acknowledges and pays respect to their Elders, past and present. 4kV to the distribution cabinet (primary distribution cabinet), then the outgoing line is led to the. HSE and other organisations have produced guidance on electrical safety that is suitable for a wide range of industries and technical competencies. The Simple Precautions and Frequently asked Questions web pages will. Equipment inside usually includes isolating switches, circuit breakers, and residual current devices (RCDs). Supplies power to specific buildings or floors.