Regulations, Standards and AS/NZS 3000 Compliance
Compliance rests on the Wiring Rules (AS/NZS 3000), which is called up by state and territory electrical safety legislation. The standard covers design, selection, installation, verification, and maintenance of electrical installations. Candidates must know key definitions: the point of supply, the main switchboard, the MEN (multiple earthed neutral) system, and the protective earth and neutral conductor arrangement.
The MEN system is a frequent exam topic: the neutral bar is linked to earth at the main switchboard, and the installation's protective earth is connected to the neutral at that point only. Sub-boards must not repeat the link. Traps include confusing the MEN link with the main earth electrode, and thinking the neutral is earthed at every point.
Other key requirements: RCD protection for socket outlets and lighting in domestic installations, correct isolation and switching, and the requirement that only licensed electricians perform prescribed electrical work. Understand the role of the certificate of compliance and the electrical safety certificate.
Worked rule of thumb: for any installation question, check supply, protection, earthing, and verification in that order. If a design cannot meet voltage drop or fault-loop limits, the answer is usually to increase conductor size or reduce circuit length, not to ignore the limit.
Traps include quoting the standard without the legislative requirement, and assuming a standard is voluntary when it is called up by law.