AS/NZS 3000:2018 Compliance Checklist for NZ Electricians
Everything you need to know about the Wiring Rules standard. Complete compliance requirements, testing procedures, and how to properly issue Certificates of Compliance.
AS/NZS 3000:2018 (commonly called "the Wiring Rules") is the bible for electrical work in New Zealand. Whether you're doing a new installation or an alteration, understanding this standard is essential for every electrician. Non-compliance can lead to failed inspections, liability issues, and problems with insurance claims.
Important Update
AS/NZS 3000:2018 replaced the 2007 version. Key changes include new requirements for safety switches (RCDs), isolation requirements, and enhanced testing procedures. Make sure you're working to the current standard.
What is AS/NZS 3000:2018?
AS/NZS 3000:2018 is the joint Australian/New Zealand standard that sets out the requirements for electrical installations. It covers:
- Design and construction of electrical installations
- Circuit protection and earthing requirements
- Isolation and switching provisions
- Safety devices (RCDs, circuit breakers)
- Testing and verification procedures
- Documentation requirements including CoCs
When Do You Need a Certificate of Compliance?
Under the Electricity Act 1992, you must issue a Certificate of Compliance (CoC) for:
Always Required
- • New electrical installations
- • Connection to power supply
- • Mains work (replacement/repair)
- • Solar/EV charger installations
Alterations & Additions
- • New circuits
- • Switchboard upgrades
- • Significant rewiring
- • When specified by inspector
Section-by-Section Compliance Checklist
1. General Requirements
- Installation is safe and suitable for continued use
- All equipment is fit for purpose and correctly rated
- Environmental conditions are considered (moisture, temperature, etc.)
- Accessibility for operation, inspection, and maintenance
2. Circuit Protection
- Circuit breakers/fuses correctly rated for cable capacity
- Earth leakage protection (RCDs) installed where required
- Socket outlet circuits: 30mA RCD protection mandatory
- Lighting circuits: 30mA RCD required for new installations
- Coordinated protection (discrimination) between devices
3. Earthing Requirements
- Main earthing conductor correctly sized and connected
- Earth electrode installed (typically 16mm² copper or larger)
- All exposed conductive parts earthed
- Main earth bar connections tight and accessible
- MEN connection present and correct
4. Isolation and Switching
- Main switch accessible and clearly labeled
- Isolation possible for all circuits
- Emergency switching where required
- Functional switching for control
RCD Requirements (Critical Update)
One of the biggest changes in AS/NZS 3000:2018 is the expanded requirement for Residual Current Devices (RCDs / safety switches).
Mandatory RCD Requirements:
- ✓ All socket outlet circuits: 30mA RCD (maximum trip time 40ms)
- ✓ Lighting circuits in new installations: 30mA RCD
- ✓ Final sub-circuits in domestic: 30mA RCD
- ✓ Caravans and mobile homes: 30mA RCD on supply
- ✓ Construction sites: 30mA RCD on all portable equipment
RCD Testing Requirements:
- • Test button function monthly (by user)
- • Operating time and trip current tested by electrician:
- - Type I (supervised): Every 12 months
- - Type II (domestic/residential): Every 6 months
- - Type III (medical/high risk): Every 3 months
Testing and Verification Procedures
Before issuing a Certificate of Compliance, you must perform these tests:
1. Continuity of Earthing Conductors
Verify continuity of all protective earthing conductors. Test between the earth bar and each outlet/equipment earth connection. Maximum resistance: 1Ω.
2. Insulation Resistance
Test between active conductors and earth, and between active conductors. Minimum acceptable: 1 MΩ at 500V DC for LV installations.
3. Polarity Verification
Confirm correct at all points: active, neutral, and earth in correct terminals. All switches in active conductors.
4. Earth Fault Loop Impedance
Measure at switchboard and at furthest point of each circuit. Must allow sufficient current to operate protective device within required time.
5. RCD Function Testing
Test push-button function. Test trip time at 5× rated current (should trip within 40ms for 30mA RCDs).
Completing the Certificate of Compliance
The CoC is a legal document. Complete it accurately and keep copies for your records.
Required Information on CoC:
Installation Details:
- • Installation address
- • Customer details
- • Installation type
- • Date of work
Electrician Details:
- • Full name
- • EWRB registration number
- • Company name (if applicable)
- • Contact details
Common CoC Mistakes to Avoid
Wrong EWRB Number
Always double-check your registration number. An incorrect number invalidates the CoC.
Missing Test Results
Record all test values, not just pass/fail. Include actual measurements.
Incorrect Dates
The date of work must be accurate. Don't backdate or use approximate dates.
Using Software for Compliance
Modern software can help ensure you never miss a compliance requirement:
How TPT ERP Helps with Compliance
- Digital CoC generation with all required fields
- Checklist templates for AS/NZS 3000 requirements
- Test result recording and storage
- Automatic EWRB number inclusion on all certificates
- Cloud storage of all CoCs for 7+ years
FAQ
Do I need a CoC for replacing a socket?
Generally no, if it's a like-for-like replacement. However, if you're adding new circuits or significantly altering the installation, a CoC is required. When in doubt, issue one - it protects you.
How long must I keep CoC records?
You must retain copies of all Certificates of Compliance for at least 7 years. Keep them accessible in case of future queries or insurance claims.
What happens if I don't comply with AS/NZS 3000?
Non-compliance can result in failed inspections, requirement to redo work at your cost, disciplinary action by EWRB, liability if someone is injured, and insurance claim denials. Always work to the standard.
Can I do electrical work without being EWRB registered?
No. You must hold a current EWRB registration to carry out prescribed electrical work in New Zealand. Working without registration is illegal and dangerous.
Track Compliance Digitally
Use TPT Electrician ERP to run through AS/NZS 3000 checklists on the job, record test results, and generate your CoC — all from your phone.
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