#as3000 switchboard clearances

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Simplified Guide to the Updated Electrical Installation Wiring Rules (AS/NZS 3000:2018)

The new AS/NZS 3000:2018 Wiring Rules introduce several significant changes to reflect the latest technologies, equipment, and installation techniques. These changes are important for all electrical contractors and workers in Australia to understand and implement.

Transition Period

From June 26, 2018, to January 2019, there is a six-month transition period. During this time, electrical contractors and workers should familiarize themselves with the new rules to ensure compliance. After January 2019, all electrical installation work must follow these updated rules. Failure to comply could result in enforcement actions like fines or notices.

Key Changes in the 2018 Wiring Rules

Safety Switch Requirements (Clause 2.6.3)

Domestic Installations: Safety switches (RCDs) are now required on all final sub-circuits, including fixed equipment like cooktops, hot water systems, and air conditioning units. At least two RCDs are mandatory.

Non-Domestic Installations: 30mA RCDs must be installed on all lighting and socket outlet final sub-circuits up to 32A (previously 20A). They are also required on all final sub-circuits up to 32A supplying fixed wired equipment, especially in areas with a higher risk of electric shock (e.g., wet areas).

Section 1: Definitions

New and revised definitions have been added to improve clarity. Examples include terms like ‘arc fault detection device,’ ‘electric vehicle,’ and ‘protective earth neutral.’ This helps ensure a better understanding of the rules, especially in specialized installations.

Switch Room Requirements (Clause 2.10)

Improved emergency egress requirements.

Clearances: 1m from closed switchboards, 600mm from open doors or racked-out equipment.

Door dimensions increased to 2.2m height and 0.9m width.

Two emergency exit paths required if a switchboard exceeds 800A or 3m in length.

Main switches must be manually operated, not electronic.

External Influences IP Rating (Clause 4.1.3)

A zone has been created to clarify the IP rating for electrical equipment on external walls.

Equipment in this zone doesn’t require an IP rating. Outside the zone, equipment needs a minimum IP33 rating, except for meter boxes which can be IP23.

Lifts (Clause 4.20)

Routine lifts for people and goods are now considered electrical equipment.

Section 7 covers emergency lifts and includes requirements for safety services like fire pumps and alarms.

Kitchens, Downlights, Outbuildings, and Generators

Kitchens: A 150mm zone on either side of cooktops must be kept clear of switches and socket outlets.

Downlights: Must be marked with classification for installation. ‘IC’ or ‘IC-4’ lights can be installed anywhere.

Outbuildings: New definitions for ‘individual outbuilding’ and ‘combined building.’

Generators: Must not be installed near swimming pools or spas and must comply with AS/NZS 3010.

Arc Fault Detection Devices (Clause 2.9)

New provision for installing arc fault detection devices to prevent fires caused by small arcing. These devices are not mandatory but offer extra protection.

New Informative Appendices

Appendix N: Electrical conduits

Appendix O: Installation of Arc Fault Detection Devices

Appendix P: Electric vehicle charging stations

Appendix Q: D.C. circuit protection application guide

These appendices provide guidance on specific installation practices and safety measures.

By understanding and adopting these changes, electrical contractors and workers can ensure their practices are up to date and compliant with the latest standards.

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